refactoring? why?

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;

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;

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);