CodeLens not showing references

CodeLens stopped working for some reason in project solution that I'm dealing nowadays. It is not showing references instead "- references". However, when I open up Visual Studio with another project It works like charm.I can confirm that CodeLens is enabled. Do you have any idea to make it work?

My Solution:

Toggle the CodeLens feature off and then on again.

• Go into Tools -> Options... -> Text Editor -> All Languages -> CodeLens.
• Uncheck "Enable CodeLens" option and click OK.
• Go back into Tools -> Options... -> Text Editor -> All Languages -> CodeLens.
• Check the "Enable CodeLens" option and click OK.

Note: I've fixed the issue once before by closing the problem .cs file and then reopening it. Closing any referenced files may also be required.

My Problem(s):

Similar to the original poster, CodeLens stopped refreshing references after I made a bunch of refactors. I was seeing stale references to code that didn't exist and I was also seeing the "- references" issue as described in the original post.

My Environment & Specific Scenario:

• Visual Studio 2015 with Service Pack 2 and Resharper Ultimate 10.0.1
• I was doing a major overhaul with a ton of refactoring and my project wasn't compilable for an hour or so. Once I could compile the project again, the references weren't working.

Same problem here.
CodeLens works normally with small solutions, but not working with large ones.
And this behavior is accompanied with crash of Alm.Shared.Remoting.RemoteContainer.dll process.
Tried in VS 2013 Update 4 and VS 2013 Update 5 RC.
Solution:
Close all programs and clean %LocalAppData%\Temp folder (or maybe just ALM folder inside it).

A simple solution, which works!

I did try enabling CodeLens in Visual Studio (2015) -->

1. Quick Launch (Ctrl+Q)
2. Options (CodeLens)

But, it was enabled :( Then, it did work with: (Closing the programs), Win+R --> %temp% EnterDelete all

Try to remove .suo file which is storing some enviroment/solution settings. This helped me.

Just had this problem with VS 2019.

I tried disabling / enabling codelens and it didn't work.

I deleted the .suo after that and it didn't work.

I tried disabling / enabling codelens again (after deleting the .suo) and now it works again.

UPDATE (about 2 weeks later):

It started happening again and this time I disabled IntelliCode in Extensions and all of a sudden Codelens started working again.

UPDATE AGAIN (25 Nov 2019):

I reported this to Microsoft and had a dialog with them. You do not have to turn off all of Intellicode at this time, only disable Intellicode Refactorings in Tools -> Options -> Intellicode. The actual fix is slated for VS 2019 16.4 I believe.