Asp.net – How can I solve this problem in Visual Studio?

Hum, I would suggest that you tap windows key, type in visual studio, and select run as administrator.

It looks like the folder/directory has/requires elevated rights.

So, then try this:

So, it looks like that folder was created – perhaps having run VS with Admin rights.

Try the above.

If not, check the folder – it should be a local drive folder.

A typical folder location for such project? NOT WHERE you have the project/folder now – it should not be in app data folder.

Typical folder location should look like this:

 C:UsersKallasourcereposControlMISVBA

And inside of the above folder, then you can find/open the sln file, say like this:

Again, in above, note the folder location.

You need to move the location of your project folder to say my documents, or to the standard source->repos folder location.