SplashScreen的介绍，陈老师已经写的很详细了，呵呵。

http://www.cnblogs.com/chenxizhang/archive/2010/03/25/1694606.html

 

 

 

关于启动速度，很经典的两篇文章

http://blogs.msdn.com/b/jgoldb/archive/2007/10/10/improving-wpf-applications-startup-time.aspx

http://blogs.msdn.com/b/jgoldb/archive/2007/12/10/splash-screen-to-improve-wpf-application-perceived-cold-startup-performance.aspx