C#MD5加密

/// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="input">需要加密的參數</param>
        /// <returns>返回16位小寫字符串</returns>
        public static string GetMd5Hash(String input)
        {
            if (input == null)
            {
                return null;
            }

            MD5 md5Hash = MD5.Create();

            // 將輸入字符串轉換為字節數組並計算哈希數據 
            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

            // 創建一個 Stringbuilder 來收集字節並創建字符串 
            StringBuilder sBuilder = new StringBuilder();

            // 循環遍歷哈希數據的每一個字節並格式化為十六進制字符串 
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // 返回十六進制字符串 
            return sBuilder.ToString();
        }

/// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="inputString"></param>
        /// <returns>返回32位字符串</returns>
        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();
        }