I want that my window is completely hidden on the startup. No window, no entry in the taskbar. The user doesn\'t see, the application is started.
How can I realize that?
Don't show the window. By default there is a StartupUri defined in the App.xaml, remove it and override the OnStartup method in the code-behind to create a window, just Show and Hide it as you wish.
App.xaml
OnStartup