using System;

namespace TestUnsafe
{
    public class TestUnsafeApp
    {
        unsafe public static void Swap(int* pi, int* pj)
        {
            int tmp = *pi;
            *pi = *pj;
            *pj = tmp;
        }

        [STAThread]
        public static void Main(string[] args)
        {
            int i = 3;
            int j = 4;
            Console.WriteLine("BEFORE: i = {0}, j = {1}", i, j);

            unsafe { Swap(&i, &j); }
/*          // conceptual behavior, illegal syntax:
            unsafe
            {
                fixed (int* pi = &i, pj = &j)
                {
                    Swap(pi, pj);
                }
            }
*/
            Console.WriteLine("AFTER:  i = {0}, j = {1}", i, j);
        }
    }
}