Initial code

App.xaml.cs

@@ -0,0 +1,38 @@
+using ChrisKaczor.Wpf.Windows.FloatingStatusWindow;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Windows;
+using Settings = WorldClockStatusWindow.Properties.Settings;
+
+namespace WorldClockStatusWindow;
+
+public partial class App
+{
+    private List<IDisposable> _windowSourceList;
+
+    protected override void OnStartup(StartupEventArgs e)
+    {
+        base.OnStartup(e);
+
+        StartManager.ManageAutoStart = true;
+        StartManager.AutoStartEnabled = !Debugger.IsAttached && Settings.Default.AutoStart;
+        StartManager.AutoStartChanged += (value =>
+        {
+            Settings.Default.AutoStart = value;
+            Settings.Default.Save();
+        });
+
+        _windowSourceList =
+        [
+            new WindowSource()
+        ];
+    }
+
+    protected override void OnExit(ExitEventArgs e)
+    {
+        _windowSourceList.ForEach(ws => ws.Dispose());
+
+        base.OnExit(e);
+    }
+}