#43 – What Happens in WPF Main() Function

When creating a new WPF standalone application using the New Project wizard in Visual Studio 2013, Visual Studio automatically creates a class that derives from System.Windows.Application, as well as a static Main() function that will be the first function called when the application is started.

Here’s how the main application object is defined:

 public partial class App : Application

During the Main method, the application is started up by:

  • Creating a new instance of the Application object
  • Calling Application.InitializeComponent to constitute the application from App.xaml
  • Calling Application.Run to start the application
public static void Main()
{
    WpfApplication.App app = new WpfApplication.App();
    app.InitializeComponent();
    app.Run();
}
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