string Visit(TypeIsResolveResult result)
		{
			throw new NotImplementedException();
		}
		/// <remarks>
		/// See $7.10.10 of C# 4 Spec for details.
		/// </remarks>
		Value Visit(TypeIsResolveResult result)
		{
			var importedType = NullableType.GetUnderlyingType(Import(result.TargetType));
			var val = Convert(result.Input);
			var conversions = CSharpConversions.Get(debuggerTypeSystem);
			bool evalResult = false;
			if (!val.IsNull) {
				IType inputType = NullableType.GetUnderlyingType(val.Type);
				if (inputType.Equals(importedType))
					evalResult = true;
				else if (conversions.IsImplicitReferenceConversion(inputType, importedType))
					evalResult = true;
				else if (conversions.IsBoxingConversion(inputType, importedType))
					evalResult = true;
			}
			return Eval.CreateValue(evalThread, evalResult);
		}