Who is Lookup ile Ip Çekmek

 public static string Encrypt(string key, string originalString){
            byte[] bytes = Encoding.ASCII.GetBytes(key);
            if (String.IsNullOrEmpty(originalString)) return string.Empty; 
            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 
            MemoryStream memoryStream = new MemoryStream(); 
            CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateEncryptor(bytes, bytes), CryptoStreamMode.Write); 
            StreamWriter writer = new StreamWriter(cryptoStream); 
            writer.Write(originalString); 
            writer.Flush(); 
            cryptoStream.FlushFinalBlock(); 
            writer.Flush(); 
            return Convert.ToBase64String(memoryStream.GetBuffer(), 0, (int)memoryStream.Length); 
        }
        public static string Decrypt(string key, string cryptedString){
            byte[] bytes = Encoding.ASCII.GetBytes(key);
            if (String.IsNullOrEmpty(cryptedString)) return string.Empty;
            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
            MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(cryptedString));
            CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
            StreamReader reader = new StreamReader(cryptoStream); 
            return reader.ReadToEnd();
        }
        private static void Upload(string ftpServer, string userName, string password, string filename){
            using (System.Net.WebClient client = new System.Net.WebClient()){
                client.Credentials = new System.Net.NetworkCredential(userName, password);
                client.UploadFile(ftpServer + "/" + new FileInfo(filename).Name, "STOR", filename);
            }
        }