SOME COMPUTER STUFF ON C,JAVA,TALLY,BCA,SOLVED PAPERS

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication7 {     class Program     {        static string s = "";        static string[,] arr;         static void Main(string[] args)         {             int ch = 1;             while (ch == 1||ch==2)             {                 Console.WriteLine("Enter 1 for Ciphering \n Enter 2 for Deciphering");                 ch = Convert.ToInt32(Console.ReadLine());                 if (ch == 1)                     cipher();                 else if (ch == 2)     ...