public static void Main()
{
Employee obj = new Employee();
int x = 10, y = 20;
xyz ob = new xyz();
ob.Show(x, y); //actual argument
Console.WriteLine("X = " + x + " Y = " + y);
ob.Show(ref x, ref y); //actual argument
Console.WriteLine("new X = " + x + " new Y = " + y);
}