Hi all.,,I have a id and i am encrypting It. I am encrypting it using Rijindal encryption.then i pass the id in querystring.I t works fine but sometimes there is + in the encrypted dataand when i get the string on another page the + is missing from the encrypted data. why thisn is happening.i used this code for this.string Id = e.CommandArgument.ToString(); Encryption Obj_encry = new Encryption(); Id = Obj_encry.Encrypt(Id);