To unlock files:
  1. In the Project Explorer, select the file to lock. If you select a folder, project, or solution, any eligible child items will also be unlocked.
  2. Choose Source Control > Unlock.
  3. The dialog will list the files that can be unlocked.
  4. In that dialog, you can deselect any files you don't want to unlock.
  5. Click Unlock.
Note

Enabling the VCS > Options > Unlock Immediately option will bypass the dialog and immediately unlock files.