VS2010调试Family.Show

(1)去除文件夹的只读属性

(2)修改FamilyShowLib的target framework 为3.0,原来为2.0

(3)编译FamilyShowLib

参考：

http://stackoverflow.com/questions/3915529/getting-xaml-designer-to-show-design-in-vs2010

http://familyshow.codeplex.com/discussions/255114