C# 获取文件MD5校验码

using System;

using System.IO;

using System.Security.Cryptography;

using System.Text;

    public class MD5Code

    {

        /// <summary>

        /// Get 文件的MD5校验码

        /// </summary>

        /// <param name="fileName">文件名称</param>

        /// <returns></returns>

        public static string GetMD5HashFromFile(string fileName)

        {

                var file = new FileStream(fileName, System.IO.FileMode.Open);

                var md5 = new MD5CryptoServiceProvider();

                var bytes= md5.ComputeHash(file);

                file.Close();

                var sb = new StringBuilder();

                for (int i = ; i < bytes.Length; i++)

                {

                    sb.Append(bytes[i].ToString("x2"));

                }

                return sb.ToString();

          }

    }