The given expression is never of the provided warning.

When you try to getting type of Generic variable “T” you get this warning.Here is the sample :

class CauseWarning
{
    public void make<T>(T value)
    {
         if (typeof(T) is Test)
         Console.Write("Something"); 
    }
}
public class Test
{
}

Here is the solution:

class CauseWarning
{
    public void make<T>(T value)
    {
         if (typeof(T).IsAssignableFrom(typeof( Test)))
         Console.Write("Something"); 
    }
}
public class Test
{
}

Type.IsAssignableFrom Method Determines whether an instance of the current Type can be assigned from an instance of the specified Type.true if the c parameter and the current Type represent the same type, or if the current Type is in the inheritance hierarchy of c, or if the current Type is an interface that c supports. false if none of these conditions are the case, or if c is a null reference.