class SomeRef { public Int32 x; }

    struct SomeVal { public Int32 x; }

    class Program
    {
        static void Main(string[] args)
        {
            ValueTypeDemo();
            Console.ReadKey();
        }

        static void ValueTypeDemo()
        {
            SomeRef r1 = new SomeRef();
            SomeVal v1 = new SomeVal();
            r1.x = 5;
            v1.x = 5;
            Console.WriteLine(r1.x);
            Console.WriteLine(v1.x);

            SomeRef r2 = r1;
            SomeVal v2 = v1;
            r1.x = 8;
            v1.x = 9;
            Console.WriteLine(r1.x);
            Console.WriteLine(r2.x);
            Console.WriteLine(v1.x);
            Console.WriteLine(v2.x);
        }
    }