https://www.codeproject.com/Articles/21062/Splash-Screen-Control
https://www.codeproject.com/Articles/38291/Implement-Splash-Screen-with-WPF
https://www.codeproject.com/Articles/6511/Transparent-Splash-Screen
https://www.codeproject.com/Articles/116875/WPF-Loading-Splash-Screen