string Order = “Ord12011982″;
#region Encode
byte[] Enc = ASCIIEncoding.UTF7.GetBytes(Order);
string EncString = Convert.ToBase64String(Enc);
#endregion
#region Decode
byte[] Dec = Convert.FromBase64String(EncString);
string b = ASCIIEncoding.UTF7.GetString(Dec);
#endregion
Tou can al use UTF8,UTF32
