title: Perforce integration with visual studio without project files being checked in to perforce
body: <p>I am working on a large source base (approx 15K files) decomposed into about 25 projects. I want to keep the source in perforce (and am evaluating perforce to that end) but due to complications in the setup it isn't possible for me to keep the visual studio projects in source control, I know in theory the answer to this is to check the projects in, but that isn't feasible (we would end up with projects for several versions of VS checked in, and additionally several variants of each of these, instead they are generated automatically and this setup works very well).</p>
  
  <p>Is there a way to get VS to checkout files for editing as it goes without adding the project to perforce, to avoid the user having to go to the perforce client and manually check out each file for editing as they go? Alternatively (and even better) is there a way to get VS to recognise that the files in a project are under source control, without having to add the project to source control also?</p>
  
  <p>I know we could also take the tack of having every user check out for editing all files they might potentially want to edit ahead of time, then revert unmodified files before submitting their changes, is there a performance penalty in perforce in taking this approach?</p>