Loaded event of a WPF user control fires more than once

Question

To implement a tab-based environment in WPF we need to convert our forms to user controls, however when doing this, the Loaded event of the use

Answer 1

Your routed event handler can (and should) remove itself from the Loaded hook as the first thing it does.

public class MyClass : Window
{
    public MyClass()
    {
        Loaded += MyLoadedRoutedEventHandler;
    }

    void MyLoadedRoutedEventHandler(Object sender, RoutedEventArgs e)
    {
        Loaded -= MyLoadedRoutedEventHandler;
        /// ...
    }
};