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

You need to specify that your T type is a class with a constraint on the generic type:

public static T Method<T>(T model) where T : class, new()
{
    return model ?? new T();
}

Answer 2

Since T can be any type, there is no guarantee that T will have a static ?? operator or that the type T is nullable.

?? Operator (C# Reference)

The ?? operator is called the null-coalescing operator and is used to define a default value for nullable value types or reference types.