What code controls the startup of a WPF application?

More speci开发者_开发百科fically, how could I setup a startup sequence like this one in WPF where no window is shown at start, but a notification icon is present?

To run, WPF requires an Application object. when you execute Run on that object, the application goes into an infinite loop: the event loop responsible for handling user input and any other OS signals.

In other words, you can include a custom Main function in a WPF app just fine; it merely needs to look something like this:

[STAThread]
public static void Main(string[] args) {
    //include custom startup code here

    var app = new MyApplication();//Application or a subclass thereof
    var win = new MyWindow();//Window or a subclass thereof
    app.Run(win); //do WPF init and start windows message pump.
}

Here's an article about some of the gotcha's using this approach: The Wpf Application class: Overview and Gotcha. In particular, you'll probably want to set things like Application.ShutdownMode. This approach leaves you free to do whatever you want before any WPF code runs - but, more importantly, I hope it elucidates how WPF apps start.

Remove the StartupUri attribute from the Application root tag of your App.xaml file and add the code you want to execute in the Application.Startup event handler.