How can I tell if the graphics devise supposts MSAA?

My game uses forward rendering because I don’t have very many lights in my game (only the sun light) and I’d rather like to have MSAA available to my end users. However, certain graphics devices, such as the one in my laptop, don’t support MSAA. For those people, I’d like to use the Anti-Aliasing (Post-Effect) script to provide some of the same visual quality. As you can no doubt guess, I don’t want to have the AA (Post-Effect) script active if the user’s graphics device supports MSAA. How can I check that through scripting?

You do know that Google and the Unity website support searching?