https://www.codeproject.com/Messages/2549767/Splash-Screen.aspx
https://www.codeproject.com/Articles/6511/Transparent-Splash-Screen
https://www.codeproject.com/Articles/116875/WPF-Loading-Splash-Screen
WinForm(WPF) splash screen demo with C#
原文：http://www.cnblogs.com/rgqancy/p/7000359.html