How to: Remove Solution Folders
When you remove a Solution Folder from a solution, the Solution Folder and all the projects and items that it contains are disassociated from the solution but the physical files for the project and items still exist in storage. Although the project is no longer required in the current solution, it can be added to another solution.
Note
Whole solutions cannot be removed from within Visual Studio. To remove a solution, locate the folder containing the .sln file and delete it in Windows Explorer.
To remove a Solution Folder
In Solution Explorer, select the Solution Folder you want to remove.
On the Edit menu, choose Remove.