Is there any difference between myNullableLong.HasValue and myNullableLong != null?

Question

When I have a nullable long, for example, is there any difference between

myNullableLong.HasValue 

and

myNullableLong !=          


        

Answer 1

No.

The C# compiler has built-in support for Nullable and will turn equality operations involving null into calls to the struct's members.

n != null and n.HasValue will both compile to identical IL.