C#MD5加密

/// 

        /// MD5加密
        /// 
        /// 需要加密的参数
        /// 返回16位小写字符串
        public static string GetMd5Hash(String input)
        {
            if (input == null)
            {
                return null;
            }

            MD5 md5Hash = MD5.Create();

            // 将输入字符串转换为字节数组并计算哈希数据 
            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

            // 创建一个 Stringbuilder 来收集字节并创建字符串 
            StringBuilder sBuilder = new StringBuilder();

            // 循环遍历哈希数据的每一个字节并格式化为十六进制字符串 
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // 返回十六进制字符串 
            return sBuilder.ToString();
        }

/// 

        /// MD5加密
        /// 
        /// 
        /// 返回32位字符串
        static string StringToMD5Hash(string inputString)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            byte[] encryptedBytes = md5.ComputeHash(Encoding.ASCII.GetBytes(inputString));
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < encryptedBytes.Length; i++)
            {
                sb.AppendFormat("{0:x2}", encryptedBytes[i]);
            }
            return sb.ToString();
        }