Hi Subileau Pascal,
From the dump doesn't look like you have a lot of objects left. Maybe those are roots of your application and need to be there since they are still in use? Generally speaking you should check using
!gcroot how each object is "rooted" away from garbage collection. You can check this guide for more info:
http://davybrion.com/blog/2009/08/finding-memory-leaks-in-silverlight-with-windbg/ or my
blog post.
Good luck.
All the best,
Vladimir Milev
the Telerik team