diff --git a/build.vc11/mpir.net/mpir.net-tests/HugeIntTests/ObjectOverrides.cs b/build.vc11/mpir.net/mpir.net-tests/HugeIntTests/Conversions.cs
similarity index 76%
rename from build.vc11/mpir.net/mpir.net-tests/HugeIntTests/ObjectOverrides.cs
rename to build.vc11/mpir.net/mpir.net-tests/HugeIntTests/Conversions.cs
index 722acdfb..49518822 100644
--- a/build.vc11/mpir.net/mpir.net-tests/HugeIntTests/ObjectOverrides.cs
+++ b/build.vc11/mpir.net/mpir.net-tests/HugeIntTests/Conversions.cs
@@ -23,7 +23,7 @@ using Microsoft.VisualStudio.TestTools.UnitTesting;
 namespace MPIR.Tests.HugeIntTests
 {
     [TestClass]
-    public class ObjectOverrides
+    public class Conversions
     {
         [TestMethod]
         public void ToStringDecimal()
@@ -46,6 +46,21 @@ namespace MPIR.Tests.HugeIntTests
             }
         }
 
+        [TestMethod]
+        public void ToAndFromUlong()
+        {
+            using (var a = new HugeInt())
+            {
+                ulong b = 0xF84739ABCDEF4876;
+                a.AsUlong = b;
+                Assert.AreEqual(b.ToString(), a.ToString());
+
+                a.Value = -a;
+                ulong c = a.AsUlong;
+                Assert.AreEqual(b.ToString(), c.ToString());
+            }
+        }
+
         //todo truncated test
     }
 }
diff --git a/build.vc11/mpir.net/mpir.net-tests/mpir.net-tests.csproj b/build.vc11/mpir.net/mpir.net-tests/mpir.net-tests.csproj
index 4907bd01..b69a22a7 100644
--- a/build.vc11/mpir.net/mpir.net-tests/mpir.net-tests.csproj
+++ b/build.vc11/mpir.net/mpir.net-tests/mpir.net-tests.csproj
@@ -94,7 +94,7 @@
   <ItemGroup>
     <Compile Include="HugeIntTests\Arithmetic.cs" />
     <Compile Include="HugeIntTests\Assignment.cs" />
-    <Compile Include="HugeIntTests\ObjectOverrides.cs" />
+    <Compile Include="HugeIntTests\Conversions.cs" />
     <Compile Include="HugeIntTests\ExpressionTests.cs" />
     <Compile Include="Utilities\Accessors.cs" />
     <Compile Include="HugeIntTests\ConstructionAndDisposal.cs" />
diff --git a/build.vc11/mpir.net/mpir.net/HugeInt.cpp b/build.vc11/mpir.net/mpir.net/HugeInt.cpp
index 10c15d81..a83bedc7 100644
--- a/build.vc11/mpir.net/mpir.net/HugeInt.cpp
+++ b/build.vc11/mpir.net/mpir.net/HugeInt.cpp
@@ -163,11 +163,6 @@ namespace MPIR
 
     #pragma endregion
 
-    void HugeInt::Value::set(MpirExpression^ expr)
-    {
-        expr->AssignTo(_value);
-    }
-
     #pragma region expression special cases
 
     void MpirDivideExpression::custom_mpz_div(mpz_ptr q, mpz_srcptr n, mpz_srcptr d)
diff --git a/build.vc11/mpir.net/mpir.net/HugeInt.h b/build.vc11/mpir.net/mpir.net/HugeInt.h
index 4abee436..18b25199 100644
--- a/build.vc11/mpir.net/mpir.net/HugeInt.h
+++ b/build.vc11/mpir.net/mpir.net/HugeInt.h
@@ -321,6 +321,7 @@ namespace MPIR
             void FromString(String^ value, int base);
 
         internal:
+            //assignment
             virtual void AssignTo(mpz_ptr destination) override
             {
                 if(destination != _value)
@@ -350,10 +351,17 @@ namespace MPIR
             virtual String^ ToString() override;
             String^ ToString(int base);
 
-            //properties
+            //assignment
             property MpirExpression^ Value
             {
-                void set(MpirExpression^ expr);
+                void set(MpirExpression^ expr) { expr->AssignTo(_value); }
+            }
+
+            //conversions
+            property mpir_ui AsUlong
+            {
+                mpir_ui get() { return mpz_get_ui(_value); }
+                void set(mpir_ui value) { mpz_set_ui(_value, value); }
             }
     };
 };
\ No newline at end of file