public class TrippleDESCSPEncrypt    {        //12个字符          private static string customIV = "4vHKRj3yfzU=";        //32个字符          private static string customKey = "xhVs6DRXLfUGxw+AhtfQdpQGoa+8SA9d";        /// 
          /// 加密字符串          /// 
          ///           /// 
               public string EncryptPassword(string password)        {            string encryptPassword = string.Empty;            SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();            algorithm.Key = Convert.FromBase64String(customKey);            algorithm.IV = Convert.FromBase64String(customIV);//在ECB模式下，IV不起作用            algorithm.Mode = CipherMode.ECB;            algorithm.Padding = PaddingMode.PKCS7;            ICryptoTransform transform = algorithm.CreateEncryptor();            byte[] data = (new System.Text.ASCIIEncoding()).GetBytes(password);            MemoryStream memoryStream = new MemoryStream();            CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);            cryptoStream.Write(data, 0, data.Length);            cryptoStream.FlushFinalBlock();            encryptPassword = Convert.ToBase64String(memoryStream.ToArray());            memoryStream.Close();            cryptoStream.Close();            return encryptPassword;        }        /// 
          /// 解密字符串          /// 
          ///           /// 
               public string DecryptPassword(string password)        {            string decryptPassword = string.Empty;            SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();            algorithm.Key = Convert.FromBase64String(customKey);            algorithm.IV = Convert.FromBase64String(customIV);//在ECB模式下不起作用            algorithm.Mode = CipherMode.ECB;            algorithm.Padding = PaddingMode.PKCS7;            ICryptoTransform transform = algorithm.CreateDecryptor(algorithm.Key, algorithm.IV);　　　　　　　//ICryptoTransform transform = algorithm.CreateDecryptor();//在ECB模式下也可以使用此句。 　　　　　　　　 byte[] buffer = Convert.FromBase64String(password);            MemoryStream memoryStream = new MemoryStream(buffer);            CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Read);            StreamReader reader = new StreamReader(cryptoStream, System.Text.Encoding.ASCII);            decryptPassword = reader.ReadToEnd();            reader.Close();            cryptoStream.Close();            memoryStream.Close();            return decryptPassword;        }