static public string EncodeTo64(string toEncode)

    {

      byte[] toEncodeAsBytes

            = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode);

      string returnValue

            = System.Convert.ToBase64String(toEncodeAsBytes);

      return returnValue;

    }


    static public string DecodeFrom64(string encodedData)

    {

      byte[] encodedDataAsBytes

          = System.Convert.FromBase64String(encodedData);

      string returnValue =

         System.Text.ASCIIEncoding.ASCII.GetString(encodedDataAsBytes);

      return returnValue;

    }