First commit

AMessanger/Program.cs

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+using Microsoft.Extensions.DependencyInjection;
+using Avalonia;
+using System;
+using AMessanger.ViewModels;
+using AMessanger.Services;
+using System.IO;
+using System.Linq;
+
+namespace AMessanger;
+
+sealed class Program
+{
+    public static IServiceProvider Services { get; private set; } = null!;
+
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args)
+    {
+        var services = new ServiceCollection();
+
+        services.AddSingleton(p =>
+        {
+            var url = File
+                .ReadAllLines("ConnectionUrl")
+                .First(l => !string.IsNullOrWhiteSpace(l)
+                    && !l.TrimStart().StartsWith('#'));
+            
+            var chat = new ChatService(url);
+            chat.ConnectAsync();
+
+            return chat;
+        });
+
+        // ViewModels
+        services.AddTransient<MainViewModel>();
+
+        Services = services.BuildServiceProvider();
+
+        BuildAvaloniaApp()
+            .StartWithClassicDesktopLifetime(args);
+    }
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+#if DEBUG
+            .WithDeveloperTools()
+#endif
+            .WithInterFont()
+            .LogToTrace();
+}