参考链接:
http://www.cnblogs.com/beniao/archive/2010/08/11/1797537.html
MEF的简单实例:
http://www.cnblogs.com/beniao/archive/2010/08/11/1797537.html
但运行期间在“container.ComposeParts(this)”会发生“An unhandled exception of type 'System.ComponentModel.Composition.CompositionException' occurred in System.ComponentModel.Composition.dll”报错,原因没有找到。