Title: An example of private key encryption

Use the system; Use the system. Security; Use the system. Safe. Cryptography; Use the system. Io; The abstract of the namespace cry {/* *//summary//cryop. Overview of solid rgba(128, 128, 128, 1); Display : None; The background-color: rgba(255, 255, 255, 1)' {//key is equal to the length of the injected vein, privatestaticByte[]Keys=System. Text.Encoding.Unicode.GetBytes ('Everyday Up'); privatestaticByte[]IV=new byte[]{0x 12，0x34，0x56，0x78，0x90，

"color: rgba(0, 0, 0, 1)">0xAB, 0xCD, 0xEF};
        

        /**//// <summary>
        /// 加密
        /// </summary>
        public static Byte[] Enc(String test)
        {            
            System.Security.Cryptography.RC2CryptoServiceProvider rc2 = new RC2CryptoServiceProvider();
            MemoryStream msStream = new MemoryStream();    
            byte[] toEncrypt;    
            try
            {
                ICryptoTransform encrypt = rc2.CreateEncryptor(Keys,IV);
                
                CryptoStream csStream = new CryptoStream(msStream,encrypt,CryptoStreamMode.Write);

                toEncrypt = System.Text.Encoding.Unicode.GetBytes(test);
                csStream.Write(toEncrypt,0,toEncrypt.Length);
                csStream.FlushFinalBlock();
            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message,ex);
            }
            return msStream.ToArray();

        } 

        /**//// <summary>
        /// 解密
        /// </summary>
        public static String Dec(Byte[] enc)
        {
            System.Security.Cryptography.RC2CryptoServiceProvider rc2 = new RC2CryptoServiceProvider();
            try
            {
                ICryptoTransform decrypt = rc2.CreateDecryptor(Keys,IV);
                MemoryStream msDec = new MemoryStream(enc);
                CryptoStream csDec = new CryptoStream(msDec,decrypt,CryptoStreamMode.Read);
                byte[] fromEncpty = new Byte[enc.Length];
                csDec.Read(fromEncpty,0,fromEncpty.Length);
                return System.Text.Encoding.Unicode.GetString(fromEncpty);
            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message,ex);
            }
            
        }
    }
}