Added checking for updates

App.xaml.cs

@@ -1,14 +1,52 @@
-using System.Configuration;
-using System.Data;
-using System.Windows;
+using System.Windows;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Http;
+using MossyUpdater.Services;
+using MossyUpdater.ViewModels;
 
 namespace MossyUpdater
 {
-    /// <summary>
-    /// Interaction logic for App.xaml
-    /// </summary>
     public partial class App : Application
     {
+        private ServiceProvider? _serviceProvider;
+
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            base.OnStartup(e);
+
+            var services = new ServiceCollection();
+            ConfigureServices(services);
+            _serviceProvider = services.BuildServiceProvider();
+
+            var mainWindow = new MainWindow
+            {
+                DataContext = _serviceProvider.GetRequiredService<MainViewModel>()
+            };
+            mainWindow.Show();
+        }
+
+        protected override void OnExit(ExitEventArgs e)
+        {
+            var mainViewModel = _serviceProvider?.GetService<MainViewModel>();
+            mainViewModel?.Dispose();
+            _serviceProvider?.Dispose();
+            base.OnExit(e);
+        }
+
+        private static void ConfigureServices(IServiceCollection services)
+        {
+            services.AddSingleton<ILogger, FileLogger>();
+            services.AddSingleton<ISettingsService, SettingsService>();
+            services.AddSingleton<IQuotesService, QuotesService>();
+
+            services.AddHttpClient<IDownloadService, DownloadService>(client =>
+            {
+                client.Timeout = TimeSpan.FromMinutes(10);
+                client.DefaultRequestHeaders.Add("User-Agent", "MossyUpdater/1.0");
+            });
+
+            services.AddSingleton<MainViewModel>();
+        }
     }
 
 }