WebView2: Forwarding Alt Keys to a Host WPF Window by @RickStrahl weblog.west-wind.com

Here's a quick tip if you're using the new WebView2 browser control and you need to forward menu and toolbar shortcuts from the new Edge based WebView2 control to WPF. Unlike the old IE based WebBrowser control, the WebView2 doesn't do 'passthrough' key forwarding for some keys