public void Do1()
{
GenericTest <int, string> .DoStatic();
GenericTest <bool, int> .DoStatic2(false, 42);
GenericTest <bool, int> .DoStatic3(false, 42, "wow");
GenericTest <int, string> instance = new GenericTest <int, string>();
instance.DoExtension(42, "wow", '2');
Grouping <string, int> x = null;
x.FirstOrDefault(1234);
}
public static void DoExtension <T1, T2, T>(this GenericTest <T1, T2> i, T1 a, T2 b, T c)
{
GenericTest <T1, T2> .DoStatic3(a, b, c);
i.DoInstance(a, b, c);
}