Apply TornadoAce icon to WinUI window

TornadoAce_CJOnStyle/App.xaml.cs

@@ -1,3 +1,8 @@
+using Microsoft.UI.Windowing;
+using System;
+using System.IO;
+using WinRT.Interop;
+
 namespace TornadoAce_CJOnStyle
 {
     /// <summary>
@@ -28,6 +33,8 @@ namespace TornadoAce_CJOnStyle
                 Title = "TornadoAce CJ OnStyle CG Automation"
             };
 
+            ApplyWindowIcon(window);
+
             if (window.Content is not Frame rootFrame)
             {
                 rootFrame = new Frame();
@@ -39,6 +46,24 @@ namespace TornadoAce_CJOnStyle
             window.Activate();
         }
 
+        private static void ApplyWindowIcon(Window targetWindow)
+        {
+            var iconPath = Path.Combine(AppContext.BaseDirectory, "Assets", "AppIcon.ico");
+            if (!File.Exists(iconPath))
+            {
+                return;
+            }
+
+            var windowHandle = WindowNative.GetWindowHandle(targetWindow);
+            if (windowHandle == IntPtr.Zero)
+            {
+                return;
+            }
+
+            var windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(windowHandle);
+            AppWindow.GetFromWindowId(windowId)?.SetIcon(iconPath);
+        }
+
         /// <summary>
         /// Invoked when Navigation to a certain page fails
         /// </summary>

TornadoAce_CJOnStyle/TornadoAce_CJOnStyle.csproj

@@ -30,7 +30,9 @@
     <ItemGroup>
         <Content Include="Assets\SplashScreen.scale-200.png" />
         <Content Include="Assets\SplashScreen.png" />
-        <Content Include="Assets\AppIcon.ico" />
+        <Content Include="Assets\AppIcon.ico">
+            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+        </Content>
         <Content Include="Assets\LockScreenLogo.scale-200.png" />
         <Content Include="Assets\LoginBroadcastControlRoom.png" />
         <Content Include="Assets\TornadoAceAppIcon.png" />