using System;

using System.IO;

using System.Security.Cryptography;

​

namespace ConsoleApp3

{

    class Program

    {

        static void Main(string[] args)

        {

            // md5("123456") = e10adc3949ba59abbe56e057f20f883e

            var filePath = @"temp.txt";

            File.WriteAllText(filePath, "123456");

            var fileMD5 = "e10adc3949ba59abbe56e057f20f883e";

            using (var md5 = MD5.Create())

            {

                using var openFile = File.OpenRead(filePath);

​

                var hash = md5.ComputeHash(openFile);

                Console.WriteLine($"FileStream: {BitConverter.ToString(hash).Replace("-", null).ToLower()}");

            }

​

            using (var md5 = MD5.Create())

            {

                using var openFile = File.OpenRead(filePath);

                using var stream = new BufferedStream(openFile, 1200000);

​

                var hash = md5.ComputeHash(stream);

                Console.WriteLine($"BufferedStream: {BitConverter.ToString(hash).Replace("-", null).ToLower()}");

            }

​

            Console.WriteLine($"正确的MD5值为: {fileMD5}");

            Console.ReadLine();

            Console.WriteLine("Hello World!");

        }

    }

}

​