Implement the change between loader & main screen while using the DI

I18N Commander/UI WinForms/Program.cs

@@ -1,17 +1,61 @@
+using DataModel;
+using DataModel.Database.Common;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
 namespace UI_WinForms;
 
 internal static class Program
 {
+    internal const string VERSION = "v0.1.0";
+    internal static IServiceProvider SERVICE_PROVIDER;
+
+    
     [STAThread]
     private static void Main()
     {
         ApplicationConfiguration.Initialize();
+        Application.EnableVisualStyles();
 
         // Start the loader screen:
         var loader = new Loader();
         Application.Run(loader);
 
-        // Start the main app:
+        //
-        Application.Run(new Main());
+        // Create the DI system
+        //
+        var builder = new HostBuilder();
+            
+        //
+        // Add services
+        //
+        builder.ConfigureServices((hostContext, serviceCollection) =>
+        {
+            // The main form:
+            serviceCollection.AddSingleton<Main>();
+
+            // The database:
+            serviceCollection.AddDatabase(loader.DataFile, true);
+        });
+
+        // Get the host out of the DI system:
+        var host = builder.Build();
+
+        // Create a service scope:
+        using (var scope = host.Services.CreateScope())
+        {
+            // Get a service provider:
+            SERVICE_PROVIDER = scope.ServiceProvider;
+
+            // Apply database migrations:
+            using (var database = SERVICE_PROVIDER.GetRequiredService<DataContext>())
+                Setup.PerformDataMigration(database).Wait();
+
+            // Create the main window:
+            var mainWindow = SERVICE_PROVIDER.GetService<Main>();
+            
+            // Start the app:
+            Application.Run(mainWindow);
+        }
     }
 }