Pass by Reference using out

   struct Increment
        {
            void increment(out int n)
            {
                n = 2;
                n = n + 1;
                Console.WriteLine("\n****in method my value is {0}", n);
            }

        static void Main()
            {
                int n ;
                Console.WriteLine("Enter any no");
               //  n = int.Parse(Console.ReadLine());
                //Console.WriteLine("\nBefore Calling method...My Value is {0}", n);
                Increment o = new Increment();
                o.increment(out n);
                Console.WriteLine("\nAfter Calling method....My Value is {0}", n);
                Console.WriteLine("Press any key to Exit");
                Console.ReadKey();
            }
        }