Type t = typeof(string);            if (t.IsPrimitive)//not             {                Console.WriteLine("string is a Primitive");            }            else             {                Console.WriteLine("string is not a Primitive");            }            Type t2 = typeof(String);            if (t2.IsPrimitive)//not             {                Console.WriteLine("String is a Primitive");            }            else            {                Console.WriteLine("String is not a Primitive");            }            Type t3 = typeof(int);            if (t3.IsPrimitive)//yes             {                Console.WriteLine("int is a Primitive");            }            else            {                Console.WriteLine("int is not a Primitive");            }            Type t4 = typeof(Int64);            if (t4.IsPrimitive)//yes            {                Console.WriteLine("Int64 is a Primitive");            }            else            {                Console.WriteLine("Int64 is not a Primitive");            }