xaml 微软帮助 url

https://msdn.microsoft.com/zh-cn/library/windows/apps/xaml/dn632431.aspx

https://msdn.microsoft.com/zh-cn/library/ms788723.aspx

https://msdn.microsoft.com/zh-cn/library/windows/apps/hh700351.aspx

https://msdn.microsoft.com/zh-cn/library/dd638655(v=vs.95).aspx