Sometimes you need to startup multiple projects while debugging, for example, if you are debugging both the client and server side pieces of a client-server solution. You can do so by right clicking on the Solution in Solution Explorer and selecting Properties. Once the property pages opens up, select “Multiple Startup projects” under Common Properties->Startup Project, and set the Action to “Start” for the projects that you want to automatically start debugging. You can also change the order of startup by using the arrow buttons on the right.