What is the entry point of a WPF application?

Question

The Main method is the entry point of a C# console application. Thus, for example, if I have to start some threads or services, I will do it within the Ma

Answer 1

Your main entry point is an override of OnStartup in the code-behind of App.Xaml :

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        // here you take control
    }
}

Other points of interest might be Application.OnActivate() and the Loaded and Initialized events of your MainWindow.

If I have to start some threads or services, where should write the code for starting them?

Depends on what those threads/services need and want.