Migrate to Avalonia (#1220)

DiscordChatExporter.Gui/Program.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Reflection;
+using Avalonia;
+using DiscordChatExporter.Gui.Utils;
+
+namespace DiscordChatExporter.Gui;
+
+public static class Program
+{
+    private static Assembly Assembly { get; } = typeof(App).Assembly;
+
+    public static string Name { get; } = Assembly.GetName().Name!;
+
+    public static Version Version { get; } = Assembly.GetName().Version!;
+
+    public static string VersionString { get; } = Version.ToString(3);
+
+    public static string ProjectUrl { get; } = "https://github.com/Tyrrrz/DiscordChatExporter";
+
+    public static string LatestReleaseUrl { get; } = ProjectUrl + "/releases/latest";
+
+    public static string DocumentationUrl { get; } = ProjectUrl + "/tree/master/.docs";
+
+    public static AppBuilder BuildAvaloniaApp() =>
+        AppBuilder.Configure<App>().UsePlatformDetect().LogToTrace();
+
+    [STAThread]
+    public static int Main(string[] args)
+    {
+        // Build and run the app
+        var builder = BuildAvaloniaApp();
+
+        try
+        {
+            return builder.StartWithClassicDesktopLifetime(args);
+        }
+        catch (Exception ex)
+        {
+            if (OperatingSystem.IsWindows())
+                _ = NativeMethods.Windows.MessageBox(0, ex.ToString(), "Fatal Error", 0x10);
+
+            throw;
+        }
+        finally
+        {
+            // Clean up after application shutdown
+            if (builder.Instance is IDisposable disposableApp)
+                disposableApp.Dispose();
+        }
+    }
+}