In a bit of a shameless plug, i’d like to point out that my book on Managed DirectX is available now.
As i’m sure everyone is already aware, the documentation for the Managed DirectX API left a little to be desired. My book covers every component of the Managed DirectX API, including DirectInput, DirectSound, DirectPlay, DirectDraw, but focuses the majority of the content on Direct3D.
While the other components are discussed briefly, the Direct3D API is discussed in much detail. The book takes you step by step from drawing a simple triangle on the screen all the way through character animation, and even the high level shader language.
There is no other greater source of information on Managed DirectX. With that, i’ll end my shameless plug. =)