Default value check using generic types [duplicate]

Answer 1

Throw in the class constraint and it should work.

public void Test(T instance) where T : class
{
    if (instance == default(T))
    {

    }
}

Or if you only want value types you can do this.

public void Test(T instance) where T : struct, IEquatable
{
    if (instance.Equals(default(T)))
    {

    }
}