这是一个wpf 应用程序，是使用mef 动态加载模块，分工明细，不过这只是基本框架，要应用到项目上，还得自己再次扩张，这是写给那mef 无从下手的人。-This is a wpf application that is using mef dynamically loaded modules, detailed division of labor, but this is just a basic fr a mework to be applied to the project, have th