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

@@ -7,10 +7,10 @@ using System.IO.Compression;
 using System.Runtime.InteropServices;
 using System.Threading;
 
-namespace AM2RPortHelper
+namespace AM2RPortHelper;
+
+internal static class Program
 {
-    internal static class Program
-    {
     private const string version = "1.3";
     private static readonly string tmp = Path.GetTempPath();
     private static readonly string currentDir = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory);
@@ -373,5 +373,4 @@ namespace AM2RPortHelper
         picture.Mutate(x => x.Resize(dimensions, dimensions, KnownResamplers.NearestNeighbor));
         picture.SaveAsPng(filePath);
     }
-    }
 }