Maybe useful for Add the solution to source control

The following method may be helpful for the previous two days when I checked in source safe with an additional folder, but I haven't tested it yet. I went to the company on Monday to test it again, and then send the result.
How to: Disable creation of the <solutionname>. root folder

When you add a solution to source control, your source control plug-in automatically creates an empty <solutionname>. root folder in the database to contain the unified root for the solution. for more information about the unified root, see introducing source control.

Caution:
Disabling automatic creation of the <solutionname>. root folder will change the behavior of your source control plug-in when you add multi-project solutions to source control. for one thing, operations that add projects will take more time. additionally, you will have to respond to redundant prompts when ming source control operations on multiple projects.

To disable the automatic creation of the <solutionname>. root folder

1. on the Windows desktop, click Start , then RUN .

2. type Regedit , and then click OK .

3. open HKEY_CURRENT_USER \ Software \ Microsoft \ visualstudio \ \ sourcecontrol.

4. select the key donotcreatesolutionrootfolderinsourcecontrol, and click edit , then modify .

5. In the value Data box, change 0 to 1.

6. click OK to accept your registry change.