using System;

	public class Test
	{
	        private static void assign(ref int i)
	        {
	             i = 42;
	        }
	
	        public static void Main()
	        {
	              var vars = new [] { 1,2,3,4 };
	              Console.WriteLine(vars[2]);
	              assign(ref vars[2]);
	              Console.WriteLine(vars[2]);
	        }
	}