MonoMac implementation of Indragie Karunaratne's awesome [INAppStoreWindow] (https://github.com/indragiek/INAppStoreWindow) Objective-C library.
![] (https://dl.dropboxusercontent.com/s/zyd8ewb25i4y1gj/appstorewindow_sample.png)
Checkout AppStoreWindowSample on how to use this library. Basically, all you have to do is to make your Window extend from AppStoreWindow and then set TitleHeightProperty in your AppDelegte or your WindowController.
If you are using this library in one of your projects, please let me know @ashokgelal
For uptodate status of this project, see: https://github.com/ashokgelal/AppStoreWindow