diff --git a/v2rayN/ServiceLib/Common/DownloaderHelper.cs b/v2rayN/ServiceLib/Common/DownloaderHelper.cs
index 570a95f5..03dcf8e3 100644
--- a/v2rayN/ServiceLib/Common/DownloaderHelper.cs
+++ b/v2rayN/ServiceLib/Common/DownloaderHelper.cs
@@ -86,7 +86,7 @@ namespace ServiceLib.Common
             //};
             downloader.DownloadProgressChanged += (sender, value) =>
             {
-                var ts = (DateTime.Now - totalDatetime);
+                var ts = DateTime.Now - totalDatetime;
                 if (progress != null && ts.Seconds > totalSecond)
                 {
                     hasValue = true;
@@ -146,10 +146,7 @@ namespace ServiceLib.Common
             var progressPercentage = 0;
             var hasValue = false;
             await using var downloader = new Downloader.DownloadService(downloadOpt);
-            downloader.DownloadStarted += (sender, value) =>
-            {
-                progress?.Report(0);
-            };
+            downloader.DownloadStarted += (sender, value) => progress?.Report(0);
             downloader.DownloadProgressChanged += (sender, value) =>
             {
                 hasValue = true;
diff --git a/v2rayN/ServiceLib/Common/FileManager.cs b/v2rayN/ServiceLib/Common/FileManager.cs
index c5e80794..2f452899 100644
--- a/v2rayN/ServiceLib/Common/FileManager.cs
+++ b/v2rayN/ServiceLib/Common/FileManager.cs
@@ -1,4 +1,4 @@
-using System.Formats.Tar;
+using System.Formats.Tar;
 using System.IO.Compression;
 using System.Text;
 
@@ -163,13 +163,15 @@ namespace ServiceLib.Common
 
             // Check if the source directory exists
             if (!dir.Exists)
+            {
                 throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");
+            }
 
             // Cache directories before we start copying
             var dirs = dir.GetDirectories();
 
             // Create the destination directory
-            Directory.CreateDirectory(destinationDir);
+            _ = Directory.CreateDirectory(destinationDir);
 
             // Get the files in the source directory and copy to the destination directory
             foreach (var file in dir.GetFiles())
@@ -187,7 +189,7 @@ namespace ServiceLib.Common
                 {
                     continue;
                 }
-                file.CopyTo(targetFilePath, overwrite);
+                _ = file.CopyTo(targetFilePath, overwrite);
             }
 
             // If recursive and copying subdirectories, recursively call this method
@@ -222,4 +224,4 @@ namespace ServiceLib.Common
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/v2rayN/ServiceLib/Common/Logging.cs b/v2rayN/ServiceLib/Common/Logging.cs
index 16c9228a..7f7089b7 100644
--- a/v2rayN/ServiceLib/Common/Logging.cs
+++ b/v2rayN/ServiceLib/Common/Logging.cs
@@ -28,7 +28,9 @@ namespace ServiceLib.Common
         public static void SaveLog(string strContent)
         {
             if (!LogManager.IsLoggingEnabled())
+            {
                 return;
+            }
 
             LogManager.GetLogger("Log1").Info(strContent);
         }
@@ -36,7 +38,9 @@ namespace ServiceLib.Common
         public static void SaveLog(string strTitle, Exception ex)
         {
             if (!LogManager.IsLoggingEnabled())
+            {
                 return;
+            }
 
             var logger = LogManager.GetLogger("Log2");
             logger.Debug($"{strTitle},{ex.Message}");
diff --git a/v2rayN/ServiceLib/Common/ProcUtils.cs b/v2rayN/ServiceLib/Common/ProcUtils.cs
index 70b6f3c6..561278ce 100644
--- a/v2rayN/ServiceLib/Common/ProcUtils.cs
+++ b/v2rayN/ServiceLib/Common/ProcUtils.cs
@@ -8,7 +8,7 @@ public static class ProcUtils
 
     public static void ProcessStart(string? fileName, string arguments = "")
     {
-        ProcessStart(fileName, arguments, null);
+        _ = ProcessStart(fileName, arguments, null);
     }
 
     public static int? ProcessStart(string? fileName, string arguments, string? dir)
@@ -38,7 +38,7 @@ public static class ProcUtils
                     WorkingDirectory = dir ?? string.Empty
                 }
             };
-            proc.Start();
+            _ = proc.Start();
             return dir is null ? null : proc.Id;
         }
         catch (Exception ex)
@@ -60,7 +60,7 @@ public static class ProcUtils
                 FileName = Utils.GetExePath().AppendQuotes(),
                 Verb = blAdmin ? "runas" : null,
             };
-            Process.Start(startInfo);
+            _ = Process.Start(startInfo);
         }
         catch (Exception ex)
         {
@@ -138,7 +138,9 @@ public static class ProcUtils
         fileName = null;
         processName = null;
         if (!review)
+        {
             return;
+        }
         try
         {
             procId = proc?.Id;
diff --git a/v2rayN/ServiceLib/Common/SqliteHelper.cs b/v2rayN/ServiceLib/Common/SqliteHelper.cs
index 10a7793b..dca10c57 100644
--- a/v2rayN/ServiceLib/Common/SqliteHelper.cs
+++ b/v2rayN/ServiceLib/Common/SqliteHelper.cs
@@ -7,7 +7,7 @@ namespace ServiceLib.Common
     {
         private static readonly Lazy<SQLiteHelper> _instance = new(() => new());
         public static SQLiteHelper Instance => _instance.Value;
-        private string _connstr;
+        private readonly string _connstr;
         private SQLiteConnection _db;
         private SQLiteAsyncConnection _dbAsync;
         private readonly string _configDB = "guiNDB.db";
diff --git a/v2rayN/ServiceLib/Common/StringEx.cs b/v2rayN/ServiceLib/Common/StringEx.cs
index 12613a2e..ab5b808a 100644
--- a/v2rayN/ServiceLib/Common/StringEx.cs
+++ b/v2rayN/ServiceLib/Common/StringEx.cs
@@ -22,7 +22,9 @@ namespace ServiceLib.Common
         public static bool BeginWithAny(this string s, IEnumerable<char> chars)
         {
             if (s.IsNullOrEmpty())
+            {
                 return false;
+            }
             return chars.Contains(s.First());
         }
 
@@ -36,7 +38,9 @@ namespace ServiceLib.Common
             while (reader.ReadLine() is { } line)
             {
                 if (line.IsWhiteSpace())
+                {
                     continue;
+                }
                 yield return line;
             }
         }
diff --git a/v2rayN/ServiceLib/Common/WindowsUtils.cs b/v2rayN/ServiceLib/Common/WindowsUtils.cs
index bead7899..1d4740c3 100644
--- a/v2rayN/ServiceLib/Common/WindowsUtils.cs
+++ b/v2rayN/ServiceLib/Common/WindowsUtils.cs
@@ -63,7 +63,7 @@ namespace ServiceLib.Common
                 var arg = $$""" /remove-device  "SWD\Wintun\{{{guid}}}" """;
 
                 // Try to remove the device
-                await Utils.GetCliWrapOutput(pnpUtilPath, arg);
+                _ = await Utils.GetCliWrapOutput(pnpUtilPath, arg);
             }
             catch (Exception ex)
             {
diff --git a/v2rayN/ServiceLib/Common/YamlUtils.cs b/v2rayN/ServiceLib/Common/YamlUtils.cs
index 13ad2d78..511e41e5 100644
--- a/v2rayN/ServiceLib/Common/YamlUtils.cs
+++ b/v2rayN/ServiceLib/Common/YamlUtils.cs
@@ -1,4 +1,4 @@
-using YamlDotNet.Core;
+using YamlDotNet.Core;
 using YamlDotNet.Serialization;
 using YamlDotNet.Serialization.NamingConventions;
 
@@ -62,9 +62,6 @@ namespace ServiceLib.Common
 
         public static string? PreprocessYaml(string str)
         {
-            var deserializer = new DeserializerBuilder()
-                .WithNamingConvention(PascalCaseNamingConvention.Instance)
-                .Build();
             try
             {
                 var mergingParser = new MergingParser(new Parser(new StringReader(str)));
@@ -80,4 +77,4 @@ namespace ServiceLib.Common
 
         #endregion YAML
     }
-}
\ No newline at end of file
+}