using System;

​

class Program

    {

​

        static void Main(string[] args)

        {

​

            public void Encrypt(string args)

        {

            words = words.Replace("A", "W");

​

        }

            Console.WriteLine("Enter string to be encrypted or decrypted");

            string words = Console.ReadLine();

            Console.WriteLine("Enter 1 to encrypt or enter 2 to decrypt");

            string EnOrDec = Console.ReadLine();

            int answer = Convert.ToInt16(EnOrDec);

            if (answer == 1)

                {

                Encrypt(words);                

            }

            if (answer == 2)

            {

                //decrypt method

            }

​

        }

    }