diff --git a/CompressedArray.cs b/CompressedArray.cs
index a7796ae..bed68b9 100644
--- a/CompressedArray.cs
+++ b/CompressedArray.cs
@@ -16,8 +16,8 @@ namespace DTLib
 
             public void CompressArray(T[] sourceArray)
             {
-                List<T> listMem = new List<T>();
-                List<byte> listDesc = new List<byte>();
+                var listMem = new List<T>();
+                var listDesc = new List<byte>();
                 T prevElement = sourceArray[0];
                 listMem.Add(sourceArray[0]);
                 listDesc.Add(1);
diff --git a/DefaultLogger.cs b/DefaultLogger.cs
index 4d65fca..35bacd2 100644
--- a/DefaultLogger.cs
+++ b/DefaultLogger.cs
@@ -10,7 +10,7 @@ namespace DTLib
         public static void SetLogfile(string dir, string programName)
             => Logfile = $"{dir}\\{programName}_{DateTime.Now}.log".Replace(':', '-').Replace(' ', '_');
 
-        static public string Logfile { get; set; }
+        public static string Logfile { get; set; }
         public static void Log(params string[] msg)
         {
             if (msg.Length == 1) msg[0] = "[" + DateTime.Now.ToString() + "]: " + msg[0];
diff --git a/EventHandlerAsync.cs b/EventHandlerAsync.cs
index f874a22..76b26df 100644
--- a/EventHandlerAsync.cs
+++ b/EventHandlerAsync.cs
@@ -2,6 +2,6 @@
 
 namespace DTLib
 {
-    public delegate Task EventHandlerAsync<TEventArgs>(object sender, TEventArgs e);
+    public delegate Task EventHandlerAsync<TEventArgs>(TEventArgs e);
     public delegate Task EventHandlerAsync();
 }
diff --git a/Filesystem/Directory.cs b/Filesystem/Directory.cs
index 808e07a..caa6e3d 100644
--- a/Filesystem/Directory.cs
+++ b/Filesystem/Directory.cs
@@ -22,7 +22,7 @@ namespace DTLib.Filesystem
         public static void Copy(string source_dir, string new_dir, bool owerwrite = false)
         {
             Create(new_dir);
-            List<string> subdirs = new List<string>();
+            var subdirs = new List<string>();
             List<string> files = GetAllFiles(source_dir, ref subdirs);
             for (int i = 0; i < subdirs.Count; i++)
             {
@@ -40,7 +40,7 @@ namespace DTLib.Filesystem
         public static void Copy(string source_dir, string new_dir, out List<string> conflicts, bool owerwrite = false)
         {
             conflicts = new List<string>();
-            List<string> subdirs = new List<string>();
+            var subdirs = new List<string>();
             List<string> files = GetAllFiles(source_dir, ref subdirs);
             Create(new_dir);
             for (int i = 0; i < subdirs.Count; i++)
@@ -60,7 +60,7 @@ namespace DTLib.Filesystem
         // удаляет папку со всеми подпапками и файлами
         public static void Delete(string dir)
         {
-            List<string> subdirs = new List<string>();
+            var subdirs = new List<string>();
             List<string> files = GetAllFiles(dir, ref subdirs);
             for (int i = 0; i < files.Count; i++)
                 File.Delete(files[i]);
@@ -82,7 +82,7 @@ namespace DTLib.Filesystem
         // выдает список всех файлов
         public static List<string> GetAllFiles(string dir)
         {
-            List<string> all_files = new List<string>();
+            var all_files = new List<string>();
             string[] cur_files = Directory.GetFiles(dir);
             for (int i = 0; i < cur_files.Length; i++)
             {
@@ -101,7 +101,7 @@ namespace DTLib.Filesystem
         // выдает список всех файлов и подпапок в папке
         public static List<string> GetAllFiles(string dir, ref List<string> all_subdirs)
         {
-            List<string> all_files = new List<string>();
+            var all_files = new List<string>();
             string[] cur_files = Directory.GetFiles(dir);
             for (int i = 0; i < cur_files.Length; i++)
             {
@@ -122,7 +122,7 @@ namespace DTLib.Filesystem
 
         public static void GrantAccess(string fullPath)
         {
-            System.IO.DirectoryInfo dirInfo = new System.IO.DirectoryInfo(fullPath);
+            var dirInfo = new System.IO.DirectoryInfo(fullPath);
             System.Security.AccessControl.DirectorySecurity dirSecurity = dirInfo.GetAccessControl();
             dirSecurity.AddAccessRule(new System.Security.AccessControl.FileSystemAccessRule(
                 new System.Security.Principal.SecurityIdentifier(
diff --git a/Filesystem/OldFilework.cs b/Filesystem/OldFilework.cs
index 52048dc..5fb26eb 100644
--- a/Filesystem/OldFilework.cs
+++ b/Filesystem/OldFilework.cs
@@ -22,7 +22,7 @@ namespace DTLib.Filesystem
             lock (new object())
             {
                 key += ": ";
-                using System.IO.StreamReader reader = new System.IO.StreamReader(configfile);
+                using var reader = new System.IO.StreamReader(configfile);
                 while (!reader.EndOfStream)
                 {
                     string st = reader.ReadLine();
@@ -64,8 +64,5 @@ namespace DTLib.Filesystem
                 throw new Exception($"ReadFromConfig({configfile}, {key}) error: key not found");
             }
         }
-
-
-
     }
 }
diff --git a/FrameworkFix.cs b/FrameworkFix.cs
index f82e807..f9768c2 100644
--- a/FrameworkFix.cs
+++ b/FrameworkFix.cs
@@ -46,7 +46,7 @@ namespace DTLib
         // массив в лист
         public static List<T> ToList<T>(this T[] input)
         {
-            List<T> list = new List<T>();
+            var list = new List<T>();
             list.AddRange(input);
             return list;
         }
@@ -54,7 +54,7 @@ namespace DTLib
         // удаление нескольких элементов массива
         public static T[] RemoveRange<T>(this T[] input, int startIndex, int count)
         {
-            List<T> list = input.ToList();
+            var list = input.ToList();
             list.RemoveRange(startIndex, count);
             return list.ToArray();
         }
@@ -109,7 +109,7 @@ namespace DTLib
         // хеш в виде массива байт в строку (хеш изначально не в кодировке UTF8, так что метод выше не работает с ним)
         public static string HashToString(this byte[] hash)
         {
-            StringBuilder builder = new StringBuilder();
+            var builder = new StringBuilder();
             for (int i = 0; i < hash.Length; i++)
             {
                 builder.Append(hash[i].ToString("x2"));
@@ -217,7 +217,7 @@ namespace DTLib
         }
         public static T IfNull<T>(this T input, Func<T> if_true) =>
             input is null ? if_true() : input;
-        public static void  IfIsNull<T>(this T input, Action if_true)
+        public static void IfIsNull<T>(this T input, Action if_true)
         {
             if (input is null) if_true();
         }
diff --git a/Hasher.cs b/Hasher.cs
index b43b443..d132451 100644
--- a/Hasher.cs
+++ b/Hasher.cs
@@ -20,7 +20,7 @@ namespace DTLib
         // хеш из двух массивов
         public byte[] Hash(byte[] input, byte[] salt)
         {
-            List<byte> rez = new List<byte>();
+            var rez = new List<byte>();
             rez.AddRange(input);
             rez.AddRange(salt);
             return sha256.ComputeHash(rez.ToArray());
diff --git a/Network/FSP.cs b/Network/FSP.cs
index 35d1d3a..4309351 100644
--- a/Network/FSP.cs
+++ b/Network/FSP.cs
@@ -52,7 +52,7 @@ namespace DTLib.Network
 
         public byte[] DownloadFileToMemory()
         {
-            using System.IO.MemoryStream fileStream = new System.IO.MemoryStream();
+            using var fileStream = new System.IO.MemoryStream();
             Download_SharedCode(fileStream, false);
             byte[] output = fileStream.GetBuffer();
             fileStream.Close();
@@ -142,9 +142,9 @@ namespace DTLib.Network
             if (!dirOnServer.EndsWith("\\"))
                 dirOnServer += "\\";
             Debug("b", "downloading manifest <", "c", dirOnServer + "manifest.dtsod", "b", ">\n");
-            DtsodV22 manifest = new DtsodV22(DownloadFileToMemory(dirOnServer + "manifest.dtsod").BytesToString());
+            var manifest = new DtsodV22(DownloadFileToMemory(dirOnServer + "manifest.dtsod").BytesToString());
             Debug("g", $"found {manifest.Values.Count} files in manifest\n");
-            Hasher hasher = new Hasher();
+            var hasher = new Hasher();
             foreach (string fileOnServer in manifest.Keys)
             {
                 string fileOnClient = dirOnClient + fileOnServer;
diff --git a/Network/OldNetwork.cs b/Network/OldNetwork.cs
index c1f14f6..96e2eb5 100644
--- a/Network/OldNetwork.cs
+++ b/Network/OldNetwork.cs
@@ -16,7 +16,7 @@ namespace DTLib.Network
         // пингует айпи с помощью встроенной в винду проги, возвращает задержку
         public static string PingIP(string address)
         {
-            Process proc = new Process();
+            var proc = new Process();
             proc.StartInfo.FileName = "cmd.exe";
             proc.StartInfo.Arguments = "/c @echo off & chcp 65001 >nul & ping -n 5 " + address;
             proc.StartInfo.CreateNoWindow = true;
diff --git a/Network/Package.cs b/Network/Package.cs
index dd538e6..508ffed 100644
--- a/Network/Package.cs
+++ b/Network/Package.cs
@@ -42,7 +42,7 @@ namespace DTLib.Network
                 throw new Exception($"SendPackage() error: package is too big ({data.Length} bytes)");
             if (data.Length == 0)
                 throw new Exception($"SendPackage() error: package has zero size");
-            List<byte> list = new List<byte>();
+            var list = new List<byte>();
             byte[] packageSize = data.Length.ToBytes();
             if (packageSize.Length == 1)
                 list.Add(0);