diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/Arithmetic.cs b/mpir.net/mpir.net-tests/HugeFloatTests/Arithmetic.cs
new file mode 100644
index 00000000..c65050e8
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/Arithmetic.cs
@@ -0,0 +1,507 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class Arithmetic
+    {
+        #region Add
+
+        [TestMethod]
+        public void RationalAddHugeRational()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeRational("222987435987982730594288574029879874539/590872612825179551336102196593"))
+            using (var c = new HugeRational(a + b))
+            {
+                Assert.AreEqual(a.Numerator * b.Denominator + b.Numerator * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddHugeInt()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeInt("222987435987982730594288574029879874539"))
+            using (var c = new HugeRational(a + b))
+            {
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+                c.Value = (b + 1) + a;
+                Assert.AreEqual(a.Numerator + (b + 1) * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddLimb()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                var b = 4288574029879874539UL;
+                c.Value = a + b;
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddToLimb()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                var b = 4288574029879874539UL;
+                c.Value = b + a;
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddSignedLimb()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                var b = -4288574029879874539L;
+                c.Value = a + b;
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddToSignedLimb()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                var b = -4288574029879874539L;
+                c.Value = b + a;
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddToMaxSignedLimb()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                var b = long.MinValue;
+                c.Value = b + a;
+                Assert.AreEqual(a.Numerator + b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalAddExpressionHugeRational()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeRational("222987435987982730594288574029879874539/590872612825179551336102196593"))
+            using (var c = new HugeRational())
+            {
+                c.Value = 1 + (a + b);
+                Assert.AreEqual(a.Numerator * b.Denominator + b.Numerator * a.Denominator + a.Denominator * b.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b.Denominator, c.Denominator);
+            }
+        }
+
+        #endregion
+
+        #region Subtract
+
+        [TestMethod]
+        public void RationalSubtractHugeRational()
+        {
+            using (var a = new HugeRational("445497268491433028939318409770173720259/115756986668303657898962467957"))
+            using (var b = new HugeRational("222987435987982730594288574029879874539/590872612825179551336102196593"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator * b.Denominator - b.Numerator * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractHugeInt()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeInt("222987435987982730594288574029879874539"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator - b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+                c.Value = (b + 1) - a;
+                Assert.AreEqual((b + 1) * a.Denominator - a.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractLimb()
+        {
+            var b = 4288574029879874539UL;
+            using (var a = new HugeRational("222509832503450298349318409770173720259/115756986668303657898962467957"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator - b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractFromLimb()
+        {
+            var b = 4288574029879874539UL;
+            using (var a = new HugeRational("222509832503450298349318409770173720259/115756986668303657898962467957"))
+            using (var c = new HugeRational(b - a))
+            {
+                Assert.AreEqual(b * a.Denominator - a.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractPositiveSignedLimb()
+        {
+            var b = 4288574029879874539L;
+            using (var a = new HugeRational("222509832503450298349318409770173720259/115756986668303657898962467957"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator - b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractFromPositiveSignedLimb()
+        {
+            var b = 4288574029879874539L;
+            using (var a = new HugeRational("222509832503450298349318409770173720259/115756986668303657898962467957"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator - b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractSignedLimb()
+        {
+            var b = -4288574029879874539L;
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational(a - b))
+            {
+                Assert.AreEqual(a.Numerator - b * a.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalSubtractFromSignedLimb()
+        {
+            var b = -4288574029879874539L;
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational(b - a))
+            {
+                Assert.AreEqual(b * a.Denominator - a.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        #endregion
+
+        #region Multiply
+
+        [TestMethod]
+        public void RationalMultiplyByHugeRational()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            using (var b = new HugeRational("7859487359873459872354987610987897/590872612825179551336102196593"))
+            using (var c = new HugeRational(a * b))
+            {
+                Assert.AreEqual(a.Numerator * b.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalMultiplytHugeInt()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeInt("222987435987982730594288574029879874539"))
+            using (var c = new HugeRational(a * b))
+            {
+                Assert.AreEqual(a.Numerator * b, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+                c.Value = (b + 1) * a;
+                Assert.AreEqual((b + 1) * a.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalMultiplyByLimb()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            {
+                ulong b = 17390538260286101342;
+                a.Value = a * b;
+                Assert.AreEqual("1569219546226477273686601978789044606491747469626478990/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalMultiplyLimbBy()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            {
+                ulong b = 17390538260286101342;
+                a.Value = b * a;
+                Assert.AreEqual("1569219546226477273686601978789044606491747469626478990/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalMultiplyBySignedLimb()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            {
+                long b = -7390538260286101342;
+                a.Value = a * b;
+                Assert.AreEqual("-666878558995492522701808125338061156491747469626478990/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalMultiplySignedLimbBy()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            {
+                long b = -7390538260286101342;
+                a.Value = b * a;
+                Assert.AreEqual("-666878558995492522701808125338061156491747469626478990/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        #endregion
+
+        #region Shift Left
+
+        [TestMethod]
+        public void RationalShiftLeft()
+        {
+            using (var a = new HugeRational("-12345700987ABCDEF2345CBDEFA245230948/17607EF654EB9A13FFA163C75", 16))
+            {
+                ulong b = 40;
+                a.Value = a << b;
+                Assert.AreEqual("-12345700987ABCDEF2345CBDEFA2452309480000000000/17607EF654EB9A13FFA163C75", a.ToString(16));
+            }
+        }
+
+        #endregion
+
+        #region Shift Right
+
+        [TestMethod]
+        public void RationalShiftRight()
+        {
+            using (var a = new HugeRational("ABCDEF052834524092854092874502983745029345723098457209305983434345/17607EF654EB9A13FFA163C75", 16))
+            {
+                ulong b = 96;
+                a.Value = a >> b;
+                Assert.AreEqual("ABCDEF052834524092854092874502983745029345723098457209305983434345/17607EF654EB9A13FFA163C75000000000000000000000000", a.ToString(16));
+            }
+        }
+
+        #endregion
+
+        #region Negate
+
+        [TestMethod]
+        public void RationalNegate()
+        {
+            using (var a = new HugeRational("24092854092874502983745029345723098457209/115756986668303657898962467957"))
+            {
+                a.Value = -a;
+                Assert.AreEqual("-24092854092874502983745029345723098457209/115756986668303657898962467957", a.ToString());
+                a.Value = -a;
+                Assert.AreEqual("24092854092874502983745029345723098457209/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        #endregion
+
+        #region Abs
+
+        [TestMethod]
+        public void RationalMakeAbsolute()
+        {
+            using (var a = new HugeRational("-24092854092874502983745029345723098457209/115756986668303657898962467957"))
+            {
+                a.Value = a.Abs();
+                Assert.AreEqual("24092854092874502983745029345723098457209/115756986668303657898962467957", a.ToString());
+                a.Value = a.Abs();
+                Assert.AreEqual("24092854092874502983745029345723098457209/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        #endregion
+
+        #region Invert
+
+        [TestMethod]
+        public void RationalInvert()
+        {
+            using(var a = new HugeRational("-24092854092874502983745029345723098457209/115756986668303657898962467957"))
+            {
+                a.Value = a.Invert();
+                Assert.AreEqual("-115756986668303657898962467957/24092854092874502983745029345723098457209", a.ToString());
+                a.Value = a.Invert();
+                Assert.AreEqual("-24092854092874502983745029345723098457209/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        #endregion
+
+        #region Power
+
+        [TestMethod]
+        public void RationalPower()
+        {
+            using(var n = new HugeInt("-24092854092874502983745029345723098457209"))
+            using(var d = new HugeInt("115756986668303657898962467957"))
+            using(var a = new HugeRational(n, d))
+            {
+                a.Value = a ^ 5;
+                Assert.AreEqual(n ^ 5, a.Numerator);
+                Assert.AreEqual(d ^ 5, a.Denominator);
+            }
+        }
+
+        #endregion
+
+        #region Divide
+
+        #region Int
+
+        [TestMethod]
+        public void RationalDivideHugeRational()
+        {
+            using (var a = new HugeRational("115756986668303657898962467957/394580293847502987609283945873594873409587"))
+            using (var b = new HugeRational("593169091750307653294"))
+            {
+                a.Value = a / b;
+                Assert.AreEqual("115756986668303657898962467957/234052834524092854092760134269509268758750275703033222451729578", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDivideHugeRational2()
+        {
+            using (var a = new HugeRational("90234098723098475098479385345098345/115756986668303657898962467957"))
+            using (var b = new HugeRational("6847944682037444681162770672798288913849/590872612825179551336102196593"))
+            using (var c = new HugeRational(a / b))
+            {
+                Assert.AreEqual(a.Numerator * b.Denominator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b.Numerator, c.Denominator);
+            }
+        }
+
+        [TestMethod]
+        public void RationalDivideHugeInt()
+        {
+            using (var a = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeInt("222987435987982730594288574029879874539"))
+            using (var c = new HugeRational(a / b))
+            using (var d = new HugeRational())
+            {
+                Assert.AreEqual(a.Numerator, c.Numerator);
+                Assert.AreEqual(a.Denominator * b, c.Denominator);
+                c.Value = (b + 1) / a;
+                d.Numerator.Value = (b + 1) * a.Denominator;
+                d.Denominator.Value = a.Numerator;
+                d.Canonicalize();
+                Assert.AreEqual(d, c);
+            }
+        }
+
+        #endregion
+
+        #region Limb
+
+        [TestMethod]
+        public void RationalDivideLimb()
+        {
+            using (var a = new HugeRational("115756986668303657898962467957/39458029384750298767200622330399462537522498"))
+            {
+                ulong b = 5931690917503076532;
+                a.Value = a / b;
+                Assert.AreEqual("115756986668303657898962467957/234052834524092854092874502983745029345723092857791404165816936", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDivideSignedLimb()
+        {
+            using(var a = new HugeRational("115756986668303657898962467957/39458029384750298767200622330399462537522498"))
+            {
+                long b = -5931690917503076532;
+                a.Value = a / b;
+                Assert.AreEqual("-115756986668303657898962467957/234052834524092854092874502983745029345723092857791404165816936", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDivideLimbBy()
+        {
+            using(var a = new HugeRational("115756986668303657898962467957/39458029384750298767200622330399462537522498"))
+            {
+                ulong b = 5931690917503076532;
+                a.Value = b / a;
+                Assert.AreEqual("234052834524092854092874502983745029345723092857791404165816936/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDivideSignedLimbBy()
+        {
+            using(var a = new HugeRational("115756986668303657898962467957/39458029384750298767200622330399462537522498"))
+            {
+                long b = -5931690917503076532;
+                a.Value = b / a;
+                Assert.AreEqual("-234052834524092854092874502983745029345723092857791404165816936/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        #endregion
+
+        #endregion
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/Assignment.cs b/mpir.net/mpir.net-tests/HugeFloatTests/Assignment.cs
new file mode 100644
index 00000000..00665cbd
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/Assignment.cs
@@ -0,0 +1,91 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class Assignment
+    {
+        [TestMethod]
+        public void RationalAssignCopy()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeRational())
+            {
+                b.Value = a;
+                Assert.AreEqual("-222509832503450298345029835740293845720/115756986668303657898962467957", b.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalSwap()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var b = new HugeRational("2039847290878794872059384789347534534/590872612825179551336102196593"))
+            {
+                var aValue = a._value();
+                var bValue = b._value();
+                a.Swap(b);
+                Assert.AreEqual(bValue, a._value());
+                Assert.AreEqual(aValue, b._value());
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompoundOperators()
+        {
+            using (var a = new HugeRational("938475092834705928347523452345/115756986668303657898962467957"))
+            {
+                a.Value += 1;
+                a.Value *= 10;
+                Assert.AreEqual("10542320795030095862464859203020/115756986668303657898962467957", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalAssignInt()
+        {
+            using (var a = new HugeInt("222509832503450298345029835740293845720"))
+            using (var b = new HugeRational("1/3"))
+            {
+                b.SetTo(a);
+                Assert.AreEqual("222509832503450298345029835740293845720/1", b.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalAssignInt2()
+        {
+            using (var a = new HugeInt("222509832503450298345029835740293845719"))
+            using (var d = new HugeInt("115756986668303657898962467957"))
+            using (var b = new HugeRational("1/3"))
+            {
+                b.SetTo(a, d);
+                Assert.AreEqual("222509832503450298345029835740293845719/115756986668303657898962467957", b.ToString());
+                b.SetTo(b.Numerator - b.Denominator, b.Denominator * 5);
+                Assert.AreEqual(a - d, b.Numerator);
+                Assert.AreEqual(d * 5, b.Denominator);
+            }
+        }
+        //more tests coming here
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/Comparisons.cs b/mpir.net/mpir.net-tests/HugeFloatTests/Comparisons.cs
new file mode 100644
index 00000000..5d64164e
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/Comparisons.cs
@@ -0,0 +1,678 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class Comparisons
+    {
+        #region CompareTo
+
+        [TestMethod]
+        public void RationalCompareToHugeRational()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.AreEqual(1, System.Math.Sign(b.CompareTo(a)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1)));
+                Assert.AreEqual(0, System.Math.Sign((a + c).CompareTo(-b)));
+                Assert.AreEqual(1, System.Math.Sign(a.CompareTo(null)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToObject()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.AreEqual(1, System.Math.Sign(((IComparable)b).CompareTo((object)a)));
+                Assert.AreEqual(-1, System.Math.Sign(((IComparable)a).CompareTo((object)b)));
+                Assert.AreEqual(1, System.Math.Sign(((IComparable)a).CompareTo(null)));
+                Assert.AreEqual(0, System.Math.Sign(((IComparable)(a + c)).CompareTo((object)-b)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToExpression()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.AreEqual(1, System.Math.Sign(((IComparable<RationalExpression>)b).CompareTo(a)));
+                Assert.AreEqual(-1, System.Math.Sign(((IComparable<RationalExpression>)a).CompareTo(b)));
+                Assert.AreEqual(1, System.Math.Sign(((IComparable<RationalExpression>)a).CompareTo(null)));
+                Assert.AreEqual(0, System.Math.Sign(((IComparable<RationalExpression>)(a + c)).CompareTo(-b)));
+            }
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void RationalCompareToNonExpression()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            {
+                a.CompareTo("abc");
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToLimb()
+        {
+            using (var a = new HugeRational("-222509821"))
+            {
+                ulong b = 222509820;
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1)));
+                Assert.AreEqual(0, System.Math.Sign((-(a + 1)).CompareTo(b)));
+                Assert.AreEqual(1, System.Math.Sign((-a).CompareTo(b)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToLimb2()
+        {
+            using(var a = new HugeRational("-222509947/127"))
+            {
+                ulong b = 222509820;
+                ulong d = 127;
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b, d)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1, d)));
+                Assert.AreEqual(0, System.Math.Sign((-(a + 1)).CompareTo(b, d)));
+                Assert.AreEqual(0, System.Math.Sign((-a).CompareTo(b + d, d)));
+                Assert.AreEqual(1, System.Math.Sign((-a).CompareTo(b, d)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToSignedLimb()
+        {
+            using (var a = new HugeRational("-222509821"))
+            {
+                long b = -222509820;
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1)));
+                Assert.AreEqual(0, System.Math.Sign((a + 1).CompareTo(b)));
+                Assert.AreEqual(0, System.Math.Sign(a.CompareTo(b - 1)));
+                Assert.AreEqual(1, System.Math.Sign(a.CompareTo(b - 2)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToSignedLimb2()
+        {
+            using(var a = new HugeRational("-222509947/127"))
+            {
+                long b = -222509820;
+                long d = 127;
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b, (ulong)d)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1, (ulong)d)));
+                Assert.AreEqual(0, System.Math.Sign((a + 1).CompareTo(b, (ulong)d)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b - d + 1, (ulong)d)));
+                Assert.AreEqual(0, System.Math.Sign(a.CompareTo(b - d, (ulong)d)));
+                Assert.AreEqual(1, System.Math.Sign(a.CompareTo(b - d - 1, (ulong)d)));
+            }
+        }
+
+        [TestMethod]
+        public void RationalCompareToSignedDouble()
+        {
+            using (var a = new HugeRational("-222509821"))
+            {
+                double b = -222509820;
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b)));
+                Assert.AreEqual(-1, System.Math.Sign(a.CompareTo(b + 1)));
+                Assert.AreEqual(0, System.Math.Sign((a + 1).CompareTo(b)));
+                Assert.AreEqual(0, System.Math.Sign(a.CompareTo(b - 1)));
+                Assert.AreEqual(1, System.Math.Sign(a.CompareTo(b - 1.1)));
+            }
+        }
+
+        #endregion
+
+        #region comparison operators with expr
+
+        [TestMethod]
+        public void RationalOperatorLessThan()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                c.Value = a;
+                Assert.IsTrue(a < b);
+                Assert.IsFalse(b < a);
+                Assert.IsFalse(a < c);
+                Assert.IsFalse(a < null);
+                Assert.IsTrue(null < a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorLessThanOrEqual()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                c.Value = a;
+                Assert.IsTrue(a <= b);
+                Assert.IsFalse(b <= a);
+                Assert.IsTrue(a <= c);
+                Assert.IsFalse(a <= null);
+                Assert.IsTrue(null <= a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThan()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                c.Value = a;
+                Assert.IsFalse(a > b);
+                Assert.IsTrue(b > a);
+                Assert.IsFalse(a > c);
+                Assert.IsTrue(a > null);
+                Assert.IsFalse(null > a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanOrEqual()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational())
+            {
+                c.Value = a;
+                Assert.IsFalse(a >= b);
+                Assert.IsTrue(b >= a);
+                Assert.IsTrue(a >= c);
+                Assert.IsTrue(a >= null);
+                Assert.IsFalse(null >= a);
+            }
+        }
+
+        #endregion
+
+        #region comparison operators with limb
+
+        [TestMethod]
+        public void RationalOperatorLessThanLimb()
+        {
+            using (var a = new HugeRational("3845721"))
+            {
+                ulong c = 5432;
+                ulong b = 5432349587;
+                Assert.IsTrue(a < b);
+                Assert.IsFalse(b < a);
+                Assert.IsFalse(a < c);
+                Assert.IsTrue(c < a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorLessThanOrEqualLimb()
+        {
+            using (var a = new HugeRational("3845721"))
+            {
+                ulong c = 5432;
+                ulong b = 5432349587;
+                ulong d = 3845721;
+                Assert.IsTrue(a <= b);
+                Assert.IsFalse(b <= a);
+                Assert.IsFalse(a <= c);
+                Assert.IsTrue(c <= a);
+                Assert.IsTrue(a <= d);
+                Assert.IsTrue(d <= a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanLimb()
+        {
+            using (var a = new HugeRational("3845721"))
+            {
+                ulong c = 5432;
+                ulong b = 5432349587;
+                Assert.IsFalse(a > b);
+                Assert.IsTrue(b > a);
+                Assert.IsTrue(a > c);
+                Assert.IsFalse(c > a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanOrEqualLimb()
+        {
+            using (var a = new HugeRational("3845721"))
+            {
+                ulong c = 5432;
+                ulong b = 5432349587;
+                ulong d = 3845721;
+                Assert.IsFalse(a >= b);
+                Assert.IsTrue(b >= a);
+                Assert.IsTrue(a >= c);
+                Assert.IsFalse(c >= a);
+                Assert.IsTrue(a >= d);
+                Assert.IsTrue(d >= a);
+            }
+        }
+
+        #endregion
+
+        #region comparison operators with signed limb
+
+        [TestMethod]
+        public void RationalOperatorLessThanSignedLimb()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                long c = -543254325432;
+                long b = -9587;
+                Assert.IsTrue(a < b);
+                Assert.IsFalse(b < a);
+                Assert.IsFalse(a < c);
+                Assert.IsTrue(c < a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorLessThanOrEqualSignedLimb()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                long c = -543254325432;
+                long b = -9587;
+                long d = -3845721;
+                Assert.IsTrue(a <= b);
+                Assert.IsFalse(b <= a);
+                Assert.IsFalse(a <= c);
+                Assert.IsTrue(c <= a);
+                Assert.IsTrue(a <= d);
+                Assert.IsTrue(d <= a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanSignedLimb()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                long c = -543254325432;
+                long b = -9587;
+                Assert.IsFalse(a > b);
+                Assert.IsTrue(b > a);
+                Assert.IsTrue(a > c);
+                Assert.IsFalse(c > a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanOrEqualSignedLimb()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                long c = -543254325432;
+                long b = -9587;
+                long d = -3845721;
+                Assert.IsFalse(a >= b);
+                Assert.IsTrue(b >= a);
+                Assert.IsTrue(a >= c);
+                Assert.IsFalse(c >= a);
+                Assert.IsTrue(a >= d);
+                Assert.IsTrue(d >= a);
+            }
+        }
+
+        #endregion
+
+        #region comparison operators with double
+
+        [TestMethod]
+        public void RationalOperatorLessThanDouble()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                double c = -543254325432;
+                double b = -9587;
+                Assert.IsTrue(a < b);
+                Assert.IsFalse(b < a);
+                Assert.IsFalse(a < c);
+                Assert.IsTrue(c < a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorLessThanOrEqualDouble()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                double c = -543254325432;
+                double b = -9587;
+                double d = -3845721;
+                Assert.IsTrue(a <= b);
+                Assert.IsFalse(b <= a);
+                Assert.IsFalse(a <= c);
+                Assert.IsTrue(c <= a);
+                Assert.IsTrue(a <= d);
+                Assert.IsTrue(d <= a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanDouble()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                double c = -543254325432;
+                double b = -9587;
+                Assert.IsFalse(a > b);
+                Assert.IsTrue(b > a);
+                Assert.IsTrue(a > c);
+                Assert.IsFalse(c > a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalOperatorGreaterThanOrEqualDouble()
+        {
+            using (var a = new HugeRational("-3845721"))
+            {
+                double c = -543254325432;
+                double b = -9587;
+                double d = -3845721;
+                Assert.IsFalse(a >= b);
+                Assert.IsTrue(b >= a);
+                Assert.IsTrue(a >= c);
+                Assert.IsFalse(c >= a);
+                Assert.IsTrue(a >= d);
+                Assert.IsTrue(d >= a);
+                Assert.IsFalse(d - 0.1 >= a);
+            }
+        }
+
+        #endregion
+
+        #region Equals
+
+        [TestMethod]
+        public void RationalEqualsHugeRational()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.IsFalse(b.Equals(a));
+                Assert.IsFalse(a.Equals(b + c));
+                Assert.IsTrue((a + c).Equals(-b));
+                Assert.IsFalse(a.Equals(null));
+                Assert.IsTrue(Equals(a + c, -b));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsExpression()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.IsFalse(((IEquatable<RationalExpression>)b).Equals(a));
+                Assert.IsFalse(((IEquatable<RationalExpression>)a).Equals(b));
+                Assert.IsFalse(((IEquatable<RationalExpression>)a).Equals(null));
+                Assert.IsTrue(((IEquatable<RationalExpression>)(a + c)).Equals(-b));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsNonExpression()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            {
+                Assert.IsFalse(a.Equals("abc"));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsLimb()
+        {
+            using (var a = new HugeRational("222509832503"))
+            {
+                ulong b = 222509832504;
+                Assert.IsFalse(a.Equals(b + 1));
+                Assert.IsTrue(a.Equals(b - 1));
+                Assert.IsTrue((a + 1).Equals(b));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsSignedLimb()
+        {
+            using (var a = new HugeRational("-222509832505"))
+            {
+                long b = -222509832504;
+                Assert.IsFalse(a.Equals(b + 1));
+                Assert.IsTrue(a.Equals(b - 1));
+                Assert.IsTrue((a + 1).Equals(b));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsLimb2()
+        {
+            using(var a = new HugeRational("222509832377/127"))
+            {
+                ulong b = 222509832504;
+                ulong d = 127;
+                Assert.IsFalse(a.Equals(b + 1, d));
+                Assert.IsTrue(a.Equals(b - d, d));
+                Assert.IsTrue((a + 1).Equals(b, d));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsSignedLimb2()
+        {
+            using(var a = new HugeRational("-222509832377/127"))
+            {
+                long b = -222509832504;
+                ulong d = 127;
+                Assert.IsFalse(a.Equals(b + 1, d));
+                Assert.IsTrue(a.Equals(b + (long)d, d));
+                Assert.IsTrue((a - 1).Equals(b, d));
+            }
+        }
+
+        [TestMethod]
+        public void RationalEqualsDouble()
+        {
+            using (var a = new HugeRational("-222509832505"))
+            {
+                double b = -222509832504;
+                Assert.IsFalse(a.Equals(b + 1));
+                Assert.IsTrue(a.Equals(b - 1));
+                Assert.IsTrue((a + 1).Equals(b));
+                Assert.IsFalse((a + 1).Equals(b + 0.1));
+            }
+        }
+
+        #endregion
+
+        #region Equality operators with expr
+
+        [TestMethod]
+        public void RationalEqualsOperatorHugeRational()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.IsFalse(b == a);
+                Assert.IsFalse(a == b + c);
+                Assert.IsTrue(a + c == -b);
+                Assert.IsFalse(a == null);
+            }
+        }
+
+        [TestMethod]
+        public void RationalNotEqualOperatorHugeRational()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            using (var b = new HugeRational("222509832503450298345029835740293845720/115756986668303657898962467957"))
+            using (var c = new HugeRational("1/115756986668303657898962467957"))
+            {
+                Assert.IsTrue(b != a);
+                Assert.IsTrue(a != b + c);
+                Assert.IsFalse(a + c != -b);
+                Assert.IsTrue(a != null);
+            }
+        }
+
+        #endregion
+
+        #region Equality operators with Limb
+
+        [TestMethod]
+        public void RationalEqualsOperatorLimb()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                ulong b = 835740293845720;
+                Assert.IsFalse(b == a);
+                Assert.IsFalse(a == b + 1);
+                Assert.IsTrue(-(a + 1) == b);
+            }
+        }
+
+        [TestMethod]
+        public void RationalNotEqualOperatorLimb()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                ulong b = 835740293845720;
+                Assert.IsTrue(b != a);
+                Assert.IsTrue(a != b + 1);
+                Assert.IsFalse(-(a + 1) != b);
+            }
+        }
+
+        #endregion
+        
+        #region Equality operators with Signed Limb
+
+        [TestMethod]
+        public void RationalEqualsOperatorSignedLimb()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                long b = -835740293845720;
+                Assert.IsFalse(b == a);
+                Assert.IsFalse(a == b + 1);
+                Assert.IsTrue(a + 1 == b);
+            }
+        }
+
+        [TestMethod]
+        public void RationalNotEqualOperatorSignedLimb()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                long b = -835740293845720;
+                Assert.IsTrue(b != a);
+                Assert.IsTrue(a != b + 1);
+                Assert.IsFalse(a + 1 != b);
+            }
+        }
+
+        #endregion
+
+        #region Equality operators with Double
+
+        [TestMethod]
+        public void RationalEqualsOperatorDouble()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                double b = -835740293845720;
+                Assert.IsFalse(b == a);
+                Assert.IsFalse(a == b + 1);
+                Assert.IsTrue(a + 1 == b);
+                Assert.IsFalse(a + 1 == b + 0.1);
+            }
+        }
+
+        [TestMethod]
+        public void RationalNotEqualOperatorDouble()
+        {
+            using (var a = new HugeRational("-835740293845721"))
+            {
+                double b = -835740293845720;
+                Assert.IsTrue(b != a);
+                Assert.IsTrue(a != b + 1);
+                Assert.IsFalse(a + 1 != b);
+                Assert.IsTrue(a + 1 != b + 0.1);
+            }
+        }
+
+        #endregion
+
+        #region GetHashCode
+
+        [TestMethod]
+        public void RationalGetHashCodeTest()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            {
+                Assert.AreNotEqual(0, a.GetHashCode());
+                Assert.AreEqual(a.GetHashCode(), (a + 0).GetHashCode());
+                Assert.AreNotEqual(a.GetHashCode(), (-a).GetHashCode());
+            }
+        }
+
+        #endregion
+
+        #region Sign
+
+        [TestMethod]
+        public void RationalSign()
+        {
+            using (var a = new HugeRational("-222509832503450298345029835740293845721/115756986668303657898962467957"))
+            {
+                Assert.AreEqual(-1, a.Sign());
+                Assert.AreEqual(1, (-a).Sign());
+                Assert.AreEqual(0, (a-a).Sign());
+            }
+        }
+
+        #endregion
+
+        //more tests coming here
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/ConstructionAndDisposal.cs b/mpir.net/mpir.net-tests/HugeFloatTests/ConstructionAndDisposal.cs
new file mode 100644
index 00000000..da55ceb7
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/ConstructionAndDisposal.cs
@@ -0,0 +1,287 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class ConstructionAndDisposal
+    {
+        [TestMethod]
+        public void RationalDefaultConstructor()
+        {
+            using (var a = new HugeRational())
+            {
+                Assert.AreNotEqual(0, a.NumeratorNumberOfLimbsAllocated());
+                Assert.AreEqual(0, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreNotEqual(IntPtr.Zero, a.NumeratorLimbs());
+                Assert.AreEqual("0", a.Numerator.ToString());
+
+                Assert.AreNotEqual(0, a.DenominatorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsUsed());
+                Assert.AreNotEqual(IntPtr.Zero, a.DenominatorLimbs());
+                Assert.AreEqual("1", a.Denominator.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalNumerator()
+        {
+            using (var a = new HugeRational())
+            {
+                a.Numerator.Dispose();
+                Assert.AreNotEqual(0, a.Numerator.NumberOfLimbsAllocated());
+                Assert.AreEqual("0", a.Numerator.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDenominator()
+        {
+            using (var a = new HugeRational())
+            {
+                a.Denominator.Dispose();
+                Assert.AreNotEqual(0, a.Denominator.NumberOfLimbsAllocated());
+                Assert.AreEqual("1", a.Denominator.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalDispose()
+        {
+            var a = new HugeRational();
+            a.Dispose();
+            
+            Assert.AreEqual(0, a.NumeratorNumberOfLimbsAllocated());
+            Assert.AreEqual(0, a.NumeratorNumberOfLimbsUsed());
+            Assert.AreEqual(IntPtr.Zero, a.NumeratorLimbs());
+
+            Assert.AreEqual(0, a.DenominatorNumberOfLimbsAllocated());
+            Assert.AreEqual(0, a.DenominatorNumberOfLimbsUsed());
+            Assert.AreEqual(IntPtr.Zero, a.DenominatorLimbs());
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromLong()
+        {
+            var n = "123456789123456";
+            var d = "12764787846358441471";
+            using (var a = new HugeRational(long.Parse(n), ulong.Parse(d)))
+            {
+                Assert.AreEqual(1, a.NumeratorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsUsed());
+                Assert.AreEqual(n + "/" + d, a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromLongNegative()
+        {
+            var n = "-123456789123456";
+            var d = "12764787846358441471";
+            using (var a = new HugeRational(long.Parse(n), ulong.Parse(d)))
+            {
+                Assert.AreEqual(1, a.NumeratorNumberOfLimbsAllocated());
+                Assert.AreEqual(-1, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsUsed());
+                Assert.AreEqual(n + "/" + d, a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromULong()
+        {
+            var d = "12764787846358441471";
+            using (var a = new HugeRational(ulong.MaxValue, ulong.Parse(d)))
+            {
+                Assert.AreEqual(1, a.NumeratorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsUsed());
+                Assert.AreEqual(ulong.MaxValue.ToString(), a.Numerator.ToString());
+                Assert.AreEqual(ulong.MaxValue.ToString() + "/" + d, a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromDouble()
+        {
+            using (var a = new HugeRational(123456789123456.75))
+            {
+                Assert.AreEqual("493827156493827/4", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromDoubleNegative()
+        {
+            using (var a = new HugeRational(-123456789123456.75))
+            {
+                Assert.AreEqual("-493827156493827/4", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalAllocate()
+        {
+            using (var a = HugeRational.Allocate(129, 193))
+            {
+                Assert.AreEqual(3, a.NumeratorNumberOfLimbsAllocated());
+                Assert.AreEqual(0, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(4, a.DenominatorNumberOfLimbsAllocated());
+                Assert.AreEqual(1, a.DenominatorNumberOfLimbsUsed());
+                Assert.AreEqual("0/1", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalCanonicalize()
+        {
+            using (var a = new HugeRational(198, 15))
+            {
+                a.Denominator.Value = -a.Denominator;
+                Assert.AreEqual("198/-15", a.ToString());
+                a.Canonicalize();
+                Assert.AreEqual("-66/5", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalStringConstructor()
+        {
+            var n = "5432109876543212345789023245987/362736035870515331128527330659";
+            using (var a = new HugeRational(n))
+            {
+                Assert.AreEqual(2, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(n, a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalStringConstructorNumeratorOnly()
+        {
+            var n = "5432109876543212345789023245987";
+            using(var a = new HugeRational(n))
+            {
+                Assert.AreEqual(2, a.NumeratorNumberOfLimbsUsed());
+                Assert.AreEqual(n + "/1", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void RationalStringConstructorInvalid()
+        {
+            var a = new HugeRational("12345A");
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void RationalStringConstructorInvalid2()
+        {
+            var a = new HugeRational("12345/54321A");
+        }
+
+        [TestMethod]
+        public void RationalStringConstructorHex()
+        {
+            using (var i = new HugeInt("362736035870515331128527330659"))
+            {
+                var d = i.ToString(16);
+                var n = "143210ABCDEF32123457ACDB324598799";
+                using (var a = new HugeRational(n + "/" + d, 16))
+                {
+                    Assert.AreEqual(n, a.Numerator.ToString(16));
+                    Assert.AreEqual(3, a.NumeratorNumberOfLimbsUsed());
+                    Assert.AreEqual(i, a.Denominator);
+                }
+            }
+        }
+
+        [TestMethod]
+        public void RationalStringConstructorHexPrefix()
+        {
+            using (var i = new HugeInt("362736035870515331128527330659"))
+            {
+                var d = i.ToString(16);
+                var n = "143210ABCDEF32123457ACDB324598799";
+                using (var a = new HugeRational("0x" + n + "/0x" + d))
+                {
+                    Assert.AreEqual(n + "/" + d, a.ToString(16));
+                    Assert.AreEqual(i, a.Denominator);
+                }
+            }
+        }
+
+        [TestMethod]
+        public void RationalStringAssignmentHexPrefix()
+        {
+            using (var i = new HugeInt("362736035870515331128527330659"))
+            {
+                var d = i.ToString(16);
+                var n = "143210ABCDEF32123457ACDB324598799";
+                using (var a = new HugeRational("0x" + n + "/0x" + d))
+                {
+                    Assert.AreEqual(n + "/" + d, a.ToString(16));
+                    Assert.AreEqual(n + "/" + d, a.ToString(16, false));
+                    Assert.AreEqual((n + "/" + d).ToLower(), a.ToString(16, true));
+                    a.SetTo("-0x" + n + "/0x17");
+                    Assert.AreEqual("-" + n + "/17", a.ToString(16));
+                }
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromExpression()
+        {
+            using (var a = new HugeRational("2340958273409578234095823045723490587/362736035870515331128527330659"))
+            using (var b = new HugeRational(a + 1))
+            {
+                Assert.AreEqual(a + 1, b);
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromIntExpression()
+        {
+            using (var a = new HugeInt("2340958273409578234095823045723490587"))
+            using (var b = new HugeRational(a + 1))
+            {
+                Assert.AreEqual("2340958273409578234095823045723490588/1", b.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalConstructorFromIntExpression2()
+        {
+            using (var a = new HugeInt("2340958273409578234095823045723490587"))
+            using (var d = new HugeInt("362736035870515331128527330659"))
+            using (var b = new HugeRational(a + 2, d * 2))
+            {
+                Assert.AreEqual(a + 2, b.Numerator);
+                Assert.AreEqual(d * 2, b.Denominator);
+            }
+        }
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/Conversions.cs b/mpir.net/mpir.net-tests/HugeFloatTests/Conversions.cs
new file mode 100644
index 00000000..02aadec3
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/Conversions.cs
@@ -0,0 +1,186 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using System.Linq;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class Conversions
+    {
+        [TestMethod]
+        public void RationalToStringDecimal()
+        {
+            var n = "-23429384756298357462983476598345623984756";
+            var d = "115756986668303657898962467957";
+            var s = n + "/" + d;
+            using (var a = new HugeRational(s))
+            {
+                Assert.AreEqual(s, a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalToStringHex()
+        {
+            var n = "-23429abcdef298357462983fedcba345623984756";
+            var d = "17607ef654eb9a13ffa163c75";
+            var s = n + "/" + d;
+            using (var a = new HugeRational(s, 16))
+            {
+                Assert.AreEqual(s, a.ToString(16, true));
+                Assert.AreEqual(s.ToUpper(), a.ToString(16));
+            }
+        }
+
+        [TestMethod]
+        public void RationalFromUlong()
+        {
+            using (var a = new HugeRational())
+            {
+                ulong b = 0xF84739ABCDEF4876;
+                ulong d = 12764787846358441471;
+                a.SetTo(b, d);
+                Assert.AreEqual(b.ToString() + "/" + d.ToString(), a.ToString());
+
+                a.SetTo(b);
+                Assert.AreEqual(b.ToString() + "/1", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalFromLong()
+        {
+            using (var a = new HugeRational())
+            {
+                long b = -0x784739ABCDEF4876;
+                ulong d = 12764787846358441471;
+                a.SetTo(b, d);
+                Assert.AreEqual(b.ToString() + "/" + d.ToString(), a.ToString());
+
+                a.SetTo(b);
+                Assert.AreEqual(b.ToString() + "/1", a.ToString());
+            }
+        }
+
+        [TestMethod]
+        public void RationalToAndFromDouble()
+        {
+            using (var a = new HugeRational())
+            {
+                a.SetTo(-123.25);
+
+                double c = a.ToDouble();
+                Assert.IsTrue(c.Equals(-123.25));
+                Assert.IsTrue(a.Equals(-123.25));
+            }
+        }
+
+        [TestMethod]
+        public void RationalToAndFromFloat()
+        {
+            using (var a = new HugeRational())
+            {
+                a.SetTo(-123.125f);
+
+                double c = a.ToDouble();
+                Assert.IsTrue(-123.125 == c);
+                Assert.IsTrue(-123.125 == a);
+                Assert.IsTrue(-123.125f == a);
+            }
+        }
+
+        [TestMethod]
+        public void RationalFromString()
+        {
+            using (var a = new HugeRational())
+            {
+                var n = "98762934876529834765234123984761/115756986668303657898962467957";
+                a.SetTo(n);
+                Assert.AreEqual(n, a.ToString());
+
+                n = "-98ABCDEF876529834765234123984761/17607EF654EB9A13FFA163C75";
+                a.SetTo(n, 16);
+                Assert.AreEqual(n, a.ToString(16));
+
+                n = "-98ABCDEF876529834765234123984761";
+                a.SetTo(n, 16);
+                Assert.AreEqual(n + "/1", a.ToString(16));
+            }
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void RationalFromInvalidString()
+        {
+            using (var a = new HugeRational())
+            {
+                a.SetTo("12345A");
+            }
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void RationalFromInvalidString2()
+        {
+            using (var a = new HugeRational())
+            {
+                a.SetTo("12345/13345A");
+            }
+        }
+
+        [TestMethod]
+        public void RationalToStringTruncated()
+        {
+            using (var d = new HugeInt("115756986668303657898962467957"))
+            using (var e = new HugeInt(d ^ 10))
+            {
+                var s = e.ToString(10);
+                var n = string.Concat("123456789".Select(c => new string(c, 30)));
+                using (var a = new HugeRational(n + "/" + s))
+                {
+                    Assert.AreEqual(n + "/" + s, a.ToString(10));
+                    Assert.AreEqual("..." + n.Substring(n.Length - 256) + "/..." + s.Substring(s.Length - 256), a.ToString());
+                    a.Value = -a;
+                    Assert.AreEqual("-..." + n.Substring(n.Length - 256) + "/..." + s.Substring(s.Length - 256), a.ToString());
+                }
+            }
+        }
+
+        [TestMethod]
+        public void RationalApproximateSizeInBase()
+        {
+            using (var a = new HugeRational("2983475029834750293429834750298347502934298347502983475029342983475029834750293429834750298347502934/115756986668303657898962467957"))
+            {
+                AssertBetween(131, 133, a.ApproximateSizeInBase(10));
+                AssertBetween(429, 429, a.ApproximateSizeInBase(2));
+                AssertBetween(109, 109, a.ApproximateSizeInBase(16));
+                AssertBetween(84, 86, a.ApproximateSizeInBase(36));
+                AssertBetween(74, 76, a.ApproximateSizeInBase(62));
+            }
+        }
+
+        private void AssertBetween(int min, int max, long actual)
+        {
+            Assert.IsTrue(actual >= min && actual <= max, "Expected {0} to {1}, actual {2}", min, max, actual);
+        }
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/ExpressionTests.cs b/mpir.net/mpir.net-tests/HugeFloatTests/ExpressionTests.cs
new file mode 100644
index 00000000..2c2b31c3
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/ExpressionTests.cs
@@ -0,0 +1,97 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class ExpressionTests
+    {
+        [TestMethod]
+        public void RationalTestAllExpressions()
+        {
+            var baseExpr = typeof(RationalExpression);
+            var allExpressions =
+                baseExpr.Assembly.GetTypes()
+                .Where(x => baseExpr.IsAssignableFrom(x) && !x.IsAbstract)
+                .ToList();
+
+            using (var a = new HugeRational(-9, 1))
+            using (var b = new HugeRational(4, 1))
+            using (var c = new HugeInt(3))
+            using (var r = MpirRandom.Default())
+            {
+                var expr = a + (-a * 2) * 3 * (a.Abs() * -2 + -64 + a * a) + 116UL + a;
+                VerifyPartialResult(r, expr, 44);
+                expr = expr + a * 5 + (a+b) * (b + 1) * (b + -3) * b + (b * -a) - (b * 25UL) - a + (b << 3) - ((a*b) << 1);
+                VerifyPartialResult(r, expr, -52);
+                expr = expr - 2 - 3UL + (b - (a << 1)) + (b * b - 15UL) * (b - a) * (a - 11) * (b - 3UL) - (-340 - a) + (20UL - b);
+                VerifyPartialResult(r, expr, 52);
+                expr = expr + (-7 - 2 * a) + (28UL - 4 * b) + -(a + b * 2) + (3 * a).Abs();
+                VerifyPartialResult(r, expr, 103);
+                expr = 36 * (expr / a + expr / (3 * b) - a / b) - b / (a + 10) + 6;
+                VerifyPartialResult(r, expr, -20);
+                expr = expr + (b >> 1) + ((b / -7L) + (a / 7UL)) * 7 + (7L / a) - (2UL / (b + 5));
+                VerifyPartialResult(r, expr, -32);
+                expr = expr + (((a / b).Invert() * 3) ^ 3) - (b + 13) / a / -3;
+                VerifyPartialResult(r, expr, -35);
+                expr = expr + c + (b - 2 * c) + (-4 * c - a) - (c - 1) * (b - 1) - (a / c) + (c * 2) / (b - 1);
+                VerifyPartialResult(r, expr, -38);
+
+                MarkExpressionsUsed(allExpressions, expr);
+            }
+
+            Assert.AreEqual(0, allExpressions.Count, "Expression types not exercised: " + string.Join("",
+                allExpressions.Select(x => Environment.NewLine + x.Name).OrderBy(x => x)));
+        }
+
+        private void VerifyPartialResult(MpirRandom rnd, RationalExpression expr, long expected)
+        {
+            rnd.Seed(123);
+
+            using (var r = new HugeRational())
+            {
+                r.Value = expr;
+                Assert.AreEqual(expected.ToString() + "/1", r.ToString());
+            }
+        }
+
+        private void MarkExpressionsUsed(List<Type> allExpressions, RationalExpression expr)
+        {
+            var type = expr.GetType();
+            allExpressions.Remove(type);
+            
+            var children = type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance)
+                .Where(x => typeof(RationalExpression).IsAssignableFrom(x.FieldType))
+                .Select(x => (RationalExpression)x.GetValue(expr))
+                .Where(x => x != null)
+                .ToList();
+
+            foreach (var childExpr in children)
+                MarkExpressionsUsed(allExpressions, childExpr);
+        }
+    }
+}
diff --git a/mpir.net/mpir.net-tests/HugeFloatTests/IO.cs b/mpir.net/mpir.net-tests/HugeFloatTests/IO.cs
new file mode 100644
index 00000000..536b0992
--- /dev/null
+++ b/mpir.net/mpir.net-tests/HugeFloatTests/IO.cs
@@ -0,0 +1,205 @@
+/*
+Copyright 2014 Alex Dyachenko
+
+This file is part of the MPIR Library.
+
+The MPIR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 3 of the License, or (at
+your option) any later version.
+
+The MPIR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MPIR Library.  If not, see http://www.gnu.org/licenses/.  
+*/
+
+using System;
+using System.IO;
+using System.Text;
+using System.Linq;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace MPIR.Tests.HugeRationalTests
+{
+    [TestClass]
+    public class IO
+    {
+        [TestMethod]
+        public void RationalInputOutputRaw()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                a.Write(ms);
+                ms.Position = 0;
+                b.Read(ms);
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStr()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStrHex()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer, 16);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader, 16);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+                Assert.AreEqual((char)0xFEFF + a.ToString(16), Encoding.UTF8.GetString(ms.ToArray()));
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStrHexPrefix()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                {
+                    writer.Write("0x");
+                    a.Numerator.Write(writer, 16);
+                    writer.Write("/0");
+                    a.Denominator.Write(writer, 8);
+                }
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStrHexLower()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer, 16, true);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader, 16);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStrOctal()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer, 8);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader, 8);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+                Assert.AreEqual((char)0xFEFF + a.ToString(8), Encoding.UTF8.GetString(ms.ToArray()));
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStrBinary()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer, 2);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader, 2);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+                Assert.AreEqual((char)0xFEFF + a.ToString(2), Encoding.UTF8.GetString(ms.ToArray()));
+            }
+        }
+
+        [TestMethod]
+        public void RationalInputOutputStr62()
+        {
+            using (var a = new HugeRational("0x10123456789ABCDEF0123456789ABCDEF0123456789ABCDEF/361720912810755408215708460645842859722715865206816237944587"))
+            using (var b = new HugeRational())
+            using (var ms = new MemoryStream())
+            {
+                a.Value = a ^ 100;
+                using (var writer = new StreamWriter(ms, Encoding.UTF8, 1024, true))
+                    a.Write(writer, 62);
+
+                ms.Position = 0;
+
+                using (var reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true))
+                    b.Read(reader, 62);
+
+                Assert.AreEqual(a, b);
+                Assert.AreEqual(ms.Length, ms.Position);
+                Assert.AreEqual((char)0xFEFF + a.ToString(62), Encoding.UTF8.GetString(ms.ToArray()));
+            }
+        }
+
+        //more tests coming here
+    }
+}