Direct3D 11 is a fairly straightforward extension of Direct3D 10.x, so you can start by learning Direct3D 10 and then move up to 11 if you want. See < >
Probably the best 'starting material' is to look at these two presentations:
SIGGRAPH 2007 - Introduction to Direct3D 10 Course
< >
Gamefest 2007 - "Windows to Reality: Getting the Most out of Direct 3D 10 Graphics in Your Games"
< >
SlimDX is a pretty straight-forward managed projection of the native Direct3D APIs, so you should find this material useful even though it is primarily for C++.
-Chuck Walbourn Senior SDE,
http://blogs.msdn.com/chuckw/
C#+SlimDX+DX11初学实例
<http://www.rkoenig.eu/index.php?option=com_content&view=article&id=17:chapter-1-grundlagen&catid=6:directx10-basics&Itemid=3>