Operator '??' cannot be applied to operands of type 'T' and 'T'

Question

I have the following generic method, but VS gives me a compile error on that. (Operator \'??\' cannot be applied to operands of type \'T\' and \'T\')

public stat         


        

Answer 1

?? is the null-coalescing operator. It can't be applied to non-nullable types. Since T can be anything, it can be an int or other primitive, non-nullable type.

If you add the condition where T : class (must be specified before new()) it forces T to be a class instance, which is nullable.