C # RAS Asymmetric Encryption class supports long strings

/// <summary>///[email protected]/// </summary>Public classmyRAs {/// <summary>        ///RAS Encryption/// </summary>        /// <param name= "Xmlpublickey" >Public Key</param>        /// <param name= "encryptstring" >plaintext</param>        /// <returns>Ciphertext</returns>          Public Static stringRsaencrypt (stringXmlpublickey,stringencryptstring) {            byte[] plaintextbarray; byte[] cyphertextbarray; stringresult=String.Empty; System.Security.Cryptography.RSACryptoServiceProvider RSA=NewRSACryptoServiceProvider (); Rsa.            Fromxmlstring (Xmlpublickey); intT = (int) (Math.ceiling (Double) Encryptstring.length/(Double) -)); //Split PlainText             for(inti =0; I <= t1; i++) {Plaintextbarray= (NewUnicodeEncoding ()). GetBytes (encryptstring.substring (i * -, Encryptstring.length-(I * -) > -? -: Encryptstring.length-(I * -))); Cyphertextbarray= RSA. Encrypt (Plaintextbarray,false); Result+ = Convert.tobase64string (Cyphertextbarray) +"Thisissplit"; }            returnResult; }        /// <summary>        ///RAS Decryption/// </summary>        /// <param name= "Xmlprivatekey" >private Key</param>        /// <param name= "decryptstring" >Ciphertext</param>        /// <returns>plaintext</returns>         Public Static stringRsadecrypt (stringXmlprivatekey,stringdecryptstring) {            byte[] plaintextbarray; byte[] dyphertextbarray; stringresult=String.Empty; System.Security.Cryptography.RSACryptoServiceProvider RSA=NewRSACryptoServiceProvider (); Rsa.            Fromxmlstring (Xmlprivatekey); string[] Split =New string[1]; split[0] ="Thisissplit"; //Split cipher            string[] mis =decryptstring.split (Split, stringsplitoptions.removeemptyentries);  for(inti =0; I < MIS. Length; i++) {Plaintextbarray=convert.frombase64string (Mis[i]); Dyphertextbarray= RSA. Decrypt (Plaintextbarray,false); Result+= (Newunicodeencoding ()).            GetString (Dyphertextbarray); }            returnResult; }         /// <summary>        ///generate public and private key pairs/// </summary>        /// <returns>string[] 0: Private key; 1: Public Key</returns>         Public Static string[] Rsakey () {string[] keys =New string[2]; System.Security.Cryptography.RSACryptoServiceProvider RSA=NewRSACryptoServiceProvider (); keys[0] = RSA. Toxmlstring (true); keys[1] = RSA. Toxmlstring (false); returnkeys; }    }

C # RAS Asymmetric Encryption class supports long strings