程序介绍：
我需要一个WP7的日历控件，网络上也不能找到，所以我决定自己写一个。程序可以随意使用和修改完善后分享。
Introduction:
I needed a calendar control for my WP7 app and since WP7 did not have any and I couldn't find anything on the internet I decided to write my own. Please feel free to use it in your project and share if you have improved on it.
