The project file could not be loaded. Root element is missing.

Loading \....vbproj ...

error : Unable to read the project file 'WebSite.vbproj'.

..\..\...\..\...vbproj.user: The project file could not be loaded. Root element is missing.

File size of vbproj.user was found to 0 bytes. Deleting one of the vbproj.user fixed the problem. This is just FYI, in case somebody else come across this in future

Feel free to post your questions or comments.