Can I use DirectX 11 from C# app?
Need to use DirectSound from WPF application. .NET 4 W7 x64
You may also want to consider the newer SharpDX. The biggest differences from SlimDX are that it doesn't support DX9 (though that's irrelevant here), and the API is directly generated from the DX SDK headers. You could even begin making Metro style apps in Windows 8 because it's ready to support Direct3D 11.1.