Visual Studio: Set default startup project

From Arian Kulp's site, the way to change the default startup project for a solution is to edit the .sln file. You'll see some Project and EndProject lines. The first Project listed will be the default startup project, so just move the one you want to the top.

Follow these steps:

1. Choose the name of the project which you want to set default startup project
2. Click to the Project on toolbar and then click Set as startup project