PR Feedback: make _logger readonly

Author: NGloreous

src/Servers/HttpSys/src/NativeInterop/UrlGroup.cs

@@ -16,8 +16,9 @@ internal class UrlGroup : IDisposable
         private static readonly int RequestPropertyInfoSize =
             Marshal.SizeOf<HttpApiTypes.HTTP_BINDING_INFO>();
 
+        private readonly ILogger _logger;
+
         private ServerSession _serverSession;
-        private ILogger _logger;
         private bool _disposed;
 
         internal unsafe UrlGroup(ServerSession serverSession, ILogger logger)