private static void Print<T>(T obj)
        {
            Type t = typeof (T);
            if (t.IsGenericType)
            {
                if (t.GetGenericTypeDefinition() == typeof(Nullable<>))
                {
                    Console.WriteLine("Nullable");
                    Console.WriteLine(t.GetGenericArguments()[0].IsEnum);
                }
                else
                {
                    Console.WriteLine("Not nullable");
                }
            }
        }