[C#] Encrypt/Decrypt BASE64 - Printable Version

Code:
#region using

using System;

#endregion



namespace EncryptAndDecrypt

{

    #region class

    class Program

    {

        #region main

        static void Main(string[] args)

        {

        start:

            Console.Clear();

            Console.WriteLine("Would you like to encrypt or decrypt?");

            String crypt = Console.ReadLine();

            if (crypt == "encrypt")

            {

                Console.Clear();

                Console.WriteLine("Text to encrypt:");

                String toEncode = Console.ReadLine();





                byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode);

                string returnvalue = System.Convert.ToBase64String(toEncodeAsBytes);

                Console.WriteLine(returnvalue);

                Console.WriteLine("\n\n\n");

                Console.WriteLine("Press Enter to continue...");

                Console.ReadLine();

                goto start;

            }

            if (crypt == "decrypt")

            {

                try

                {

                    Console.Clear();

                    Console.WriteLine("Text to decrypt:");

                    String decrypt = Console.ReadLine();

                    System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();

                    System.Text.Decoder utf8Decode = encoder.GetDecoder();

                    byte[] todecode = Convert.FromBase64String(decrypt);

                    int charCount = utf8Decode.GetCharCount(todecode, 0, todecode.Length);

                    char[] decodedc = new char[charCount];

                    utf8Decode.GetChars(todecode, 0, todecode.Length, decodedc, 0);

                    string result = new String(decodedc);

                    Console.WriteLine(result);

                    Console.WriteLine("\n\n\n");

                    Console.WriteLine("Type 'Back' to go back to the start");

                    string read = Console.ReadLine();

                    if (read == "back")

                    {

                        goto start;

                    }



                }

                catch (Exception e)

                {

                    Console.WriteLine("\n\n");

                    Console.WriteLine("Error decoding");

                    Console.WriteLine("Type back to go back or info for info on the error.");

                    string readl = Console.ReadLine();

                    if (readl == "back")

                    {

                        goto start;

                    }

                    if (readl == "info")

                    {

                        Console.WriteLine("\n\n");

                        Console.WriteLine(e.ToString());

                        Console.ReadLine();

                        Console.WriteLine("\n\n");

                        Console.WriteLine("Type 'Back' to go back");

                        string readb = Console.ReadLine();

                        if (readb == "back")

                        {

                            goto start;

                        }

                    }

                }

        #endregion main

            }

    #endregion class



        }

    }

}