How to: Build to a Common Output Directory
By default, Visual Studio builds each project in a solution in its own folder inside the solution. You can change the build output paths of your projects to force all outputs to be placed in the same folder.
To place all solution outputs in a common directory
Click on one project in the solution.
On the Project menu, click Properties.
Depending on the type of project, click on either the Compile tab or the Build tab, and set the Output path to a folder to use for all projects in the solution.
Repeat steps 1-3 for all projects in the solution.