Because of the resources devoted
to each open project, you should minimize the number of projects that
you have open at one time. The fewer projects that you have open,
the more responsive the development environment will be.
To open an existing
project, right-click the project in the Project Explorer, and select
Open
Project. Open projects are indicated with an open folder
icon.
To close an existing
project, right-click the project and select
Close Project.