using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MemoryTest2
{
    struct S1
    {
        public int x;
        public int y;
    }

    struct S2
    {
        public S1 A;
        public S1 B;
    }

    class C1
    {
        public S1 A;
        public S1 B;
    }

    class Program
    {
        static void increment1(C1 c)
        {
            c.A.x++;
            c.A.y++;
        }
        static void increment2(S1 s)
        {
            s.x++;
            s.y++;
        }
        static void Main(string[] args)
        {
            C1 class1 = new C1();
            S1 struct1 = new S1();
            S2 struct2 = new S2();
            // Examine class1, struct1, struct2 in watch
            //    (paying attention to addresses of each using & operator)

            increment1(class1);
            increment2(class1.A);
            // Examine class1 in watch
            //   what changed, and why
        }
    }
}