class UnsafeDemo
{
   static int value = 20;
   unsafe static void F(out int* pi1, ref int* pi2) 
   {
      int i = 10;
      pi1 = &i;
      fixed (int* pj = &value) {
         // ...
         pi2 = pj;
      }
   }
   
   unsafe static void Main() 
   {
      int* px1;
      int i = 10;
      int* px2 = &i;
      F(out px1, ref px2);
      System.Console.WriteLine("*px1 = {0}, *px2 = {1}", *px1, *px2);	  
	try {
	   fixed (int* p = &value) {				
	      System.Console.WriteLine((int)p);
	   }
	} finally {
	}
    }

    unsafe static void test(int *number)
    {
        System.Console.WriteLine("number = {0}", *number);

	  int *p = number;
	  *p = 1000;
		
	  System.Console.WriteLine("p = {0}", (int)p);
	  System.Console.WriteLine("*p = {0}", *p);
    }   
}