Upon one-click publish: Exception in executing publishing: An item with the same key has already been added

Question

I realize that a billion people have asked about this error, but I\'ve looked at all of them. Mine seems different. I\'m not getting any sort of source code error, no stack trac

Answer 1

instead of deleting, go inside properties/PublishProfiles, open the .pubxml file and check to see if your connection strings have been repeated/duplicated. I had this issue, removed all the duplicate connection strings to leave one remaining and it solved my issue.