Replace GetService with GetRequiredService

Author: CodingOctocat

IPConfig/App.xaml.cs

@@ -169,8 +169,8 @@ protected override void OnStartup(StartupEventArgs e)
             DefaultValue = Current.FindResource(typeof(Window))
         });
 
-        var mainWindow = Services?.GetService<MainWindow>();
-        mainWindow!.Show();
+        var mainWindow = Services.GetRequiredService<MainWindow>();
+        mainWindow.Show();
 
         base.OnStartup(e);
     }
@@ -268,7 +268,7 @@ private void SetupExceptionHandling()
 
     private void ThemeWatcher_WindowsThemeChanged(object? sender, ThemeWatcher.ThemeChangedArgs e)
     {
-        if (Services?.GetService<MainViewModel>()?.CurrentSkinType is null)
+        if (Services.GetRequiredService<MainViewModel>().CurrentSkinType is null)
         {
             UpdateSkin(ThemeWatcher.GetCurrentWindowsTheme().ToSkinType());
         }

IPConfig/ViewModels/IPConfigListViewModel.cs

@@ -162,8 +162,8 @@ protected override void OnActivated()
 
     public static ValidationResult ValidateName(string name)
     {
-        var instance = App.Current.Services.GetService<IPConfigListViewModel>();
-        bool isValid = instance?.IPConfigList.Count(x => x.Name == name) <= 1;
+        var instance = App.Current.Services.GetRequiredService<IPConfigListViewModel>();
+        bool isValid = instance.IPConfigList.Count(x => x.Name == name) <= 1;
 
         if (isValid)
         {

IPConfig/Views/IPConfigDetailView.xaml.cs

@@ -25,7 +25,7 @@ public IPConfigDetailView()
             return;
         }
 
-        DataContext = App.Current.Services.GetService<IPConfigDetailViewModel>();
+        DataContext = App.Current.Services.GetRequiredService<IPConfigDetailViewModel>();
 
         WeakReferenceMessenger.Default.Register<KeyPressMessage>(this,
             (r, m) => {

IPConfig/Views/IPConfigListView.xaml.cs

@@ -32,7 +32,7 @@ public IPConfigListView()
             return;
         }
 
-        DataContext = App.Current.Services.GetService<IPConfigListViewModel>();
+        DataContext = App.Current.Services.GetRequiredService<IPConfigListViewModel>();
 
         WeakReferenceMessenger.Default.Register<KeyPressMessage>(this,
             (r, m) => {

IPConfig/Views/IPv4ConfigView.xaml.cs

@@ -28,7 +28,7 @@ public IPv4ConfigView()
             return;
         }
 
-        DataContext = App.Current.Services.GetService<IPConfigDetailViewModel>();
+        DataContext = App.Current.Services.GetRequiredService<IPConfigDetailViewModel>();
 
         _updateTargetTimer.Interval = TimeSpan.FromMicroseconds(100);
         _updateTargetTimer.Tick += DispatcherTimer_Tick;

IPConfig/Views/MainWindow.xaml.cs

@@ -45,7 +45,7 @@ public MainWindow()
             return;
         }
 
-        DataContext = App.Current.Services.GetService<MainViewModel>();
+        DataContext = App.Current.Services.GetRequiredService<MainViewModel>();
 
         LangSource.Instance.LanguageChanged += (s, e) => UpdateTitle();
     }

IPConfig/Views/NicConfigDetailView.xaml.cs

@@ -34,7 +34,7 @@ public NicConfigDetailView()
             return;
         }
 
-        DataContext = App.Current.Services.GetService<NicConfigDetailViewModel>();
+        DataContext = App.Current.Services.GetRequiredService<NicConfigDetailViewModel>();
 
         App.Current.ThemeChanging += (s, e) => _scrollViewerVOffset = scrollViewer.VerticalOffset;
         App.Current.ThemeChanged += (s, e) => scrollViewer.ScrollToVerticalOffset(_scrollViewerVOffset);