Can't compare T value1 with T value2 = default(T). Why and how to do that on C#?

Question

I\'m trying the following:

T value1 = el.value; // it\'s of type T already
T value2 = default(T);
if (value1 != value2) // gives the following error: Operato         


        

Answer 1

Your surrounding generic class should list a constraint: T : IEquatable<T>

And then you have to use value1.Equals(value2)

The reason for all this is that not all types define operator ==