My VS solution has many projects. I am currently only working on some of them so I want CTRL+SHIFT+B to only build some. What's the best way to do it?
I thought about creating a new configuration but I would need to check it in and it does not seem right. I don't care if it will be only a "local" setting on my machine.
Right-click on the Solution and choose "Configuration Manager". Un-check the "Build" columns for each one you don't want built.
Creating a new configuration would be the best way to do it.
Alternately, create a second solution file and only add the projects you're interested in. We've done that for a few of our enterprise products where a full solution would load dozens of projects. The main reason we did this is to cut down on the resources that VS uses. Name the solution something like "My Product - minimal build". You have the option of checking it in or not.
Go to the solution explorer (CTRL+SHIFT+L for me), mark the projects you want to build, right-click them (SHIFT+F10 if you are a keyboard aficionado) and select "Build Selection"