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I have a very strange issue that seems to happen more often as time goes on. Basically, whenever I open a project (regardless of which project I open) it appears that VS can't find critical libraries that should always be present (such as System). An example of what I will see when opening a project:

enter image description here

Mousing over System shows: "Cannot resolve symbol System".

For clarity, I am also using Resharper as well as GhostDoc but those are the only two plugins I am using and neither of them seemed to cause this issue when I first installed them way back when.

I've also tried cleaning the project multiple times with no luck. Any ideas?

leppie
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user2357446
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  • Does it work if you disable the extensions? – Patrick Hofman Jan 06 '15 at 16:04
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    Make sure they are added as references or at at least System is added in your reference folder. If that doesn't solve it, I would make sure that your computer has those. Did you somehow disallow the System references? – Adam Jan 06 '15 at 16:04
  • What .dll files do you see in `References`? Normally there will be a number of default libraries, but you could be using a template without any default references. – Servy Jan 06 '15 at 16:10
  • Have you restarted Visual Studio? – CodeCaster Jan 06 '15 at 16:20
  • I'm seeing the same issue w/ ReSharper Ultimate 9.2. I've confirmed the System DLL is there and tried clearing the cache, restarting Visual Studio and restarting the PC. Nothing seems to help. – Shawn South Sep 03 '15 at 18:16
  • Following the steps in this answer is the only suggestion that worked for me: http://stackoverflow.com/a/19772172/1058872 ReSharper Ultimate 9.2 on Visual Studio 2013 Update 5 – Shawn South Sep 03 '15 at 19:30

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I had a similar problem which was fixed by hitting the Clear Caches button in options enter image description here

Nikewatch
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