Why is there a difference in checking null against a value in VB.NET and C#?

Question

In VB.NET this happens:

Dim x As System.Nullable(Of Decimal) = Nothing
Dim y As System.Nullable(Of Decimal) = Nothing
         


        

Answer 1

Your VB code is simply incorrect - if you change the "x <> y" to "x = y" you will still have "false" as the result. The most common way of expression this for nullable instances is "Not x.Equals(y)", and this will yield the same behavior as "x != y" in C#.