Fixed Warnings

CSharp/Applications/AvaloniaLoggingDI/App.axaml.cs

@@ -37,7 +37,7 @@ public partial class App : Application
             // catch all unhandled errors
             AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
 
-            HostApplicationBuilder builder = Host.CreateApplicationBuilder();
+            HostApplicationBuilder builder = Microsoft.Extensions.Hosting.Host.CreateApplicationBuilder();
 
             builder
                 /*
@@ -87,24 +87,24 @@ public partial class App : Application
 
             services
                 .AddSingleton<MainViewModel>()
-                .AddSingleton<MainWindow>(service => new MainWindow
+                .AddSingleton(service => new MainWindow
                 {
                     DataContext = service.GetRequiredService<MainViewModel>()
                 });
 
-            _host = builder.Build();
-            _cancellationTokenSource = new();
+            Host = builder.Build();
+            CancellationTokenSource = new();
 
             try
             {
                 LogStartingMode();
 
                 // set and show
-                desktop.MainWindow = _host.Services.GetRequiredService<MainWindow>();
+                desktop.MainWindow = Host.Services.GetRequiredService<MainWindow>();
                 desktop.ShutdownRequested += OnShutdownRequested;
 
                 // startup background services
-                _ = _host.StartAsync(_cancellationTokenSource.Token);
+                _ = Host.StartAsync(CancellationTokenSource.Token);
             }
             catch (OperationCanceledException)
             {
@@ -131,15 +131,13 @@ public partial class App : Application
         }
     }
     private void OnShutdownRequested(object? sender, ShutdownRequestedEventArgs e)
-        => _ = _host!.StopAsync(_cancellationTokenSource!.Token);
+        => _ = Host?.StopAsync(CancellationTokenSource!.Token);
 
-    #region Fields
-
-    private IHost? _host;
-    private CancellationTokenSource? _cancellationTokenSource;
-
-    #endregion
+ 
+    private IHost? Host { get; set; }
+    private CancellationTokenSource? CancellationTokenSource { get; set; }
 
+ 
     private void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
         => ShowMessageBox("Unhandled Error", ((Exception)e.ExceptionObject).Message);
 
@@ -161,7 +159,7 @@ public partial class App : Application
             StringComparison.OrdinalIgnoreCase);
 
         // initialize a logger & EventId
-        ILogger<App> logger = _host!.Services.GetRequiredService<ILogger<App>>();
+        ILogger<App> logger = Host!.Services.GetRequiredService<ILogger<App>>();
         EventId eventId = new EventId(id: 0, name: Assembly.GetEntryAssembly()!.GetName().Name);
 
         // log a test pattern for each log level

CSharp/Applications/AvaloniaLoggingDI/Program.cs

@@ -3,7 +3,7 @@ using System;
 
 namespace AvaloniaLoggingDI;
 
-internal class Program
+internal sealed class Program
 {
     // Initialization code. Don't use any Avalonia, third-party APIs or any
     // SynchronizationContext-reliant code before AppMain is called: things aren't initialized

CSharp/Applications/AvaloniaLoggingDI/Views/MainWindow.axaml

@@ -10,7 +10,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         
-        Title="C# AVALONIA | LogViewer Control Example - Dot Net 7.0"
+        Title="AvaloniaLoggingDI-MsLogger"
         Icon="/Assets/avalonia-logo.ico"
         WindowStartupLocation="CenterScreen" Height="634" Width="600">