.net MD5加密

  　　　 /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="input">需要加密的字符串</param>
        /// <returns></returns>
        public static string MD5Encrypt(string input)
        {
            return MD5Encrypt(input, new UTF8Encoding());
        }

        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="input">需要加密的字符串</param>
        /// <param name="encode">字符的编码</param>
        /// <returns></returns>
        public static string MD5Encrypt(string input, Encoding encode)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(encode.GetBytes(input));
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < t.Length; i++)
                sb.Append(t[i].ToString("x").PadLeft(2, '0'));
            return sb.ToString();
        }