Visual studio doesn't recognize namespace inside same project

Question

The problem that i have is that when i open the solution that i am working on, in some files it will not recognize a namespace even thought that namespace is part of the same project and the solution builds fine. I could get rid of this problem by deleting my .suo file in the solution root folder but it is getting annoying to delete the .suo file every time i load the solution, plus i like the options that visual studio remembers the documents that i had opened when i closed the solution. I have heard that this may be caused by an extension but i disabled all the extensions and it still happens.

I am using visual studio ultimate 2013. I am working on a big solution that is connected with tfs and many peoples are working on it.

Does anybody have any idea why this is happening?

Answer 1

This question is old and I'm on a newer version of Visual Studio (2017), but having the same problem and my Google search led me to this question.

The solution to this in VS 2017 seems to be to delete the .vs folder that's in the same folder as the solution file. It's hidden, so you'll have to either show hidden files to see it or open a command prompt in that location and run the command

attrib -h .vs