use filescoped namespace

AM2RPortHelper/AM2RPortHelper.csproj

@@ -2,8 +2,9 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <RollForward>LatestMajor</RollForward>
+    <LangVersion>10</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

AM2RPortHelper/Program.cs

@@ -7,8 +7,8 @@ using System.IO.Compression;
 using System.Runtime.InteropServices;
 using System.Threading;
 
-namespace AM2RPortHelper
+namespace AM2RPortHelper;
-{
+
 internal static class Program
 {
     private const string version = "1.3";
@@ -374,4 +374,3 @@ namespace AM2RPortHelper
         picture.SaveAsPng(filePath);
     }
 }
-}