using System;

using System.Text;

using System.IO;

using System.Security.Cryptography;

namespace ConsoleApplication13

{

    class Program

    {

        static void Main(string[] args)

        {

            string imgPath1 = @"..\..\Images\lj.jpg";

            string imgPath2 = @"..\..\Images\lj2.jpg";

            string imgPath3 = @"..\..\Images\lj3.jpg";

            string imgPath4 = @"..\..\Images\lj4.jpg";

            string md51 = GetMD5(imgPath1);

            string md52 = GetMD5(imgPath2);

            string md53 = GetMD5(imgPath3);

            string md54 = GetMD5(imgPath4);

            Console.WriteLine($"path:{imgPath1},md51:{md51}");

            Console.WriteLine($"path:{imgPath2},md52:{md52}");

            Console.WriteLine($"path:{imgPath3},md53:{md53}");

            Console.WriteLine($"path:{imgPath4},md54:{md54}");

            Console.ReadLine();

        }

        static string GetMD5(string sourceFile)

        {

            StringBuilder md5Builder = new StringBuilder();

            if (File.Exists(sourceFile))

            {

                using (MD5 md5Hash = MD5.Create())

                {

                    using(FileStream fs=File.Open(sourceFile,FileMode.Open))

                    {

                        byte[] md5Bytes = md5Hash.ComputeHash(fs);

                        for (int i = ; i < md5Bytes.Length; i++)

                        {

                            string sortedByte = md5Bytes[i].ToString("x2");

                            if (!string.IsNullOrEmpty(sortedByte))

                            {

                                md5Builder.Append(sortedByte);

                            }

                        }

                    }

                }

            }

            return md5Builder.ToString();

        }

    }

}