ClickOnce - Cannot publish because a project failed to build

Question

When I try to publish my (WPF, C#) application, I get these errors:
Cannot publish because a project failed to build.
Could not find file \'obj\\x86\\Debug

Answer 1

I have sometimes had problems with an ASP.NET project publishing, because the publish wizard couldn't delete files in the directory it was trying to publish the files to.

Try clearing out those file manually before publishing. Also check the output window; it will sometimes give you some hints as to why the publish failed.