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This project cannot be added to the solution because it already exists in the solution in a hidden Solution Folder.

  • Article

A project can exist in a solution in only one location.

To correct this error

  • To show hidden Solution Folders, select the solution or a Solution Folder that contains a hidden Solution Folder and then on the Project menu, select Unhide Folders.

See Also

Tasks

How to: Hide Solution Folders

Concepts

Solution Folders