Can I use Visual Studio with Unity?

Unity has a wiki page explaining how to do this. It seems that the latest version of Unity should already allow you to create a Visual Studio project (if you're running Windows). However, it seems only VS 2008 is supported natively. You can follow this workaround to get it to work with VS2010 (except VS2010 Express Edition) to some degree.

Unity exports a VS 2008 project. I built a VS 2010 exporter so you can avoid fighting with the upgrade wizard. http://u3d.as/2gR

You can check UnityVS from SyntaxTree. With this extension you can code & debug Unity 3D games using VisualStudio

http://unityvs.com/

Disclaimer: both Sébastien and I are working on UnityVS