0GCJRa5A

1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Diagnostics;
6
7namespace WindowsFormsApplication31
8{
9    public enum Mode
10    {
11        Encode,
12        Decode
13    }
14    public static class Crypt
15    {
16        public static string cesarShift(string plainText, int secretKey, Mode mode)
17        {
18            string cipherText = "";
19
20            foreach (Char c in plainText)
21            {
22                char _c = ' ';
23
24                if(mode == Mode.Encode) _c = (char)(c + secretKey);
25                else if (mode == Mode.Decode) _c = (char)(c - secretKey);
26
27                cipherText += _c.ToString();
28            }
29
30            return cipherText;
31        }
32    }
33}