Creating a Solution
To create a solution, you first create a project. Because projects can’t be loaded independently of a solution within Visual Studio, creating a project causes a solution to be created at the same time.
There actually is a way to create a blank, or empty, solution without also creating a project. While creating a new project, if you expand the Other Project Types node that appears in the Installed Templates list, you will see a category for Visual Studio Solutions. This contains a Blank Solution template. Blank solutions are useful when you need to create a new solution to house a series of already existing projects; the blank solution obviates the need to worry about an extra, unneeded project being created on disk. ...