Where can I get Microsoft.DirectX.dll?

I have no idea where to get it. Is开发者_如何学C it just the Microsoft SDK? And if yes, how can I add it to my project(Visual Studios 2010 C#)?

The managed DirectX wrappers are obsolete and no longer included with the DirectX SDK. The last version that had it was the February 2010 release. You can still download it. Replacement is XNA.

It's part of the Microsoft DirectX SDK. This Code Project tutorial goes over getting yourself up-and-running in Visual Studio.

You can get it at DirectX Developer Center