There are times when you want to set which project in your visual studio solution should be built and deployed first. You can set the startup projects in Visual Studio 2012 easily by following the below steps
How to Set Startup Projects in Visual Studio 2012 ?
1. In the Visual Studio 2012 Solution explorer , select the startup project.
2. Right click and select “Set as Startup Project” in the context menu as shown in the below screenshot.