Should a .sln be committed to source control?

Question

Is it a best practice to commit a .sln file to source control? When is it appropriate or inappropriate to do so?

Update There were several good poin

Answer 1

We do because it keeps everything in sync. All the necessary projects are located together, and no one has to worry about missing one. Our build server (Ant Hill Pro) also uses the sln to figure which projects to build for a release.