test

Test2/Test2.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Test2", "Test2\Test2.csproj", "{C4E4D325-036A-4937-A6B9-4B54D4A6B5B0}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C4E4D325-036A-4937-A6B9-4B54D4A6B5B0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C4E4D325-036A-4937-A6B9-4B54D4A6B5B0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C4E4D325-036A-4937-A6B9-4B54D4A6B5B0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C4E4D325-036A-4937-A6B9-4B54D4A6B5B0}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

Test2/Test2/MD5.cs

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+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading;
+
+namespace Test2
+{
+    public class MD5
+    {
+        public static string CheckSum(string path)
+        {
+            var dir = new DirectoryInfo(path);
+            var otherdir = dir.GetDirectories();
+            var files = dir.GetFiles();
+            var md5 = new MD5CryptoServiceProvider();
+            string hash = BitConverter.ToString(md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(dir.Name)));
+            hash += MD5Single(otherdir);
+            return hash;
+        }
+
+        public static string CheckSumMulti(string path)
+        {
+            var dir = new DirectoryInfo(path);
+            var otherdir = dir.GetDirectories();
+            var files = dir.GetFiles();
+            var md5 = new MD5CryptoServiceProvider();
+            string hash = BitConverter.ToString(md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(dir.Name)));
+            hash += MD5Multi(otherdir);
+            return hash;
+        }
+
+        private static string MD5Single(DirectoryInfo[] dirs)
+        {
+            var md5 = new MD5CryptoServiceProvider();
+            string hash = null;
+            foreach (var d in dirs)
+            {
+                var byteDirHash = md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(d.Name));
+                hash += BitConverter.ToString(byteDirHash);
+                var files = d.GetFiles();
+                foreach (var f in files)
+                {
+                    hash += FileHash(f, md5);
+                }
+                MD5Single(d.GetDirectories());
+            }
+            return hash;
+        }
+
+        private static string FileHash(FileInfo file, MD5CryptoServiceProvider md5)
+        {
+            var fileStream = File.OpenRead(file.FullName);
+            byte[] hashByte = md5.ComputeHash(fileStream);
+            return BitConverter.ToString(hashByte);
+        }
+
+        private static string FindHash(DirectoryInfo dir)
+        {
+            var size = dir.GetFiles().Length < Environment.ProcessorCount
+                ? dir.GetFiles().Length
+                : Environment.ProcessorCount;
+            var threads = new Thread[size];
+            var chunkSize = dir.GetFiles().Length / threads.Length + 1;
+            var md5 = new MD5CryptoServiceProvider();
+            var bytedir = md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(dir.Name));
+            var hash = BitConverter.ToString(bytedir);
+            var files = dir.GetFiles();
+            for (int i = 0; i < dir.GetFiles().Length; i++)
+            {
+                var localI = i;
+                threads[i] = new Thread(() =>
+                {
+                    for (var l = localI * chunkSize; l < (localI + 1) * chunkSize && l < files.Length; ++l)
+                    {
+                        hash += FileHash(files[l], md5);
+                    }
+                });
+            }
+            foreach (var thread in threads)
+            {
+                thread.Start();
+            }
+
+            foreach (var thread in threads)
+            {
+                thread.Join();
+            }
+
+            return hash;
+        }
+
+
+        private static string MD5Multi(DirectoryInfo[] dirs)
+        {
+            string hash = null;
+            for (int i = 0; i < dirs.Length; ++i)
+            {
+                hash += FindHash(dirs[i]);
+            }
+
+            return hash;
+        }
+    }
+}

Test2/Test2/Program.cs

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+using System;
+
+namespace Test2
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var hash = MD5.CheckSum("C:\\Users\\89803\\Files\\MatMech\\Algebra");
+            Console.WriteLine(hash);
+            Console.WriteLine("\n");
+            hash = MD5.CheckSumMulti("C:\\Users\\89803\\Files\\MatMech\\Algebra");
+            Console.WriteLine(hash);
+        }
+    }
+}

Test2/Test2/Test2.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net5.0</TargetFramework>
+        <DockerDefaultTargetOS>Windows</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+</Project>