ReSharper “Cannot resolve symbol” even when projec

Question

My Tools:

Visual Studio 2012 Ultimate + Update 1

ReSharper v7.1.25.234

My Solution Build Status: Build Successfully

But when I install ReSharper and ReSharper code analysis is enable, many keywords of my code are red with this error:

"Cannot resolve symbol XXX"

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Another picture of my project >>

The ReSharper “CANNOT RESOLVE SYMBOL” errors are everywhere, but my project build process is successfully, and it works correctly.

Additional Note: If I disable ReSharper Code Analysis, my project will be Normal, but I want to use ReSharper code analysis.

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I tried ReSharper → Options → General → Clear Cache. But I still have this problem!

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• One month ago, I got these errors when I uninstalled Visual Studio 2012 RC and installed VS 2012 RTM.

• I've already uninstalled and installed ReSharper again. But I have this problem yet!

• My solution has five projects >> two loaded projects (main project + resource project) and three unloaded projects

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I realize that my Visual Studio also has bigger problems (More information on Stack Overflow)

• I can't add any reference to my projects (even inside new solutions and new projects)

• I can't install any package (by "Packet Manager Console" or Manage NuGet Package)

• I can't update any package (by "Packet Manager Console" or Manage NuGet Package)

I've done a lot of suggestions (of myself and others)

• Re-resister some DLL files

• Using some windows and registry repair tools

• Remove ReSharper

• Repair Visual Studio

• and...

But I could not solve it.

I'm thinking of installing a new Windows :(

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What is wrong, and how can I fix it?

Answer 1

Resharper -> Options Caches -> Store solution caches in: (Change folder to another one).

Or try to manually clean up R# cache folder

Answer 2

I was having the same issue in my Visual Studio 2015 with Resharper Ultimate and tried the solutions as suggested above, but none worked for me.

Then upgrading Resharper to latest release solved my issue.

Answer 3

I was just having the same issue with ReSharper 8.2 in Visual Studio 2013, and none of the usual solutions here of clearing caches, suspending ReSharper or re-installing ReSharper was working.

In my case I ended up solving it as follows... I looked at one of the symbols that it couldn't resolve and noted it was in System.Web.Http.dll. I then found that this was in the Microsoft.AspNet.WebApi.Core NuGet package. I used the package manager console to try and uninstall that package, except of course it told me that it couldn't due to other dependencies.

So I uninstalled each dependency up to and including Microsoft.AspNet.WebApi.Core, and then re-installed each package again in the reverse order. ReSharper picked everything up correctly as it was installed, and now seems fine.

Answer 4

I have the same problem.Clean Resharper cache and Suspend Resharper not worked for me.I just close visual studio, uninstall Resharper,and then install Resharper,the problem was gone.

Answer 5

This happens in ReSharper when you have two different versions of the same library in your solution. For example project A references automapper version 1.1 and project B references automapper version 1.0.

Visual Studio will often compile and run as expected in the situation as it chooses one of the DLLs to bind to. However ReSharper gets massively confused. For me this should be a ReSharper error that it asks you to resolve rather than just going bonkers.

UPDATE:

I ran into this two days ago (a day after I made this post) by total coincidence and came across this link where they say that it is caused by a bug in the VS API. I tried everything that they recommended and was unable to resolve it even temporarily: I had Autofac 2.6.x that I'd downloaded from google.code and then swapped it over for the NuGet package version and it willfully refused to see the new reference no matter what I did.

They suggest installing the R# 8 EAP but for me it was less hassle to just downgrade to the old version of Autofac.

Not much in the way of help, but maybe useful.

Answer 6

I'm using 7.1, and this worked for me:

1. Uninstall resharper
2. go to %appdata% and remove JetBrains\Resharper and ..\Local\JetBrains\Resharper folders
3. re-install resharper