Visual Studio 2017 - Go to Definition: Cannot navigate to the symbol undfer the caret.

Symptoms

The Go to Definition sometimes stops working, and I don't know why. The first symptom that this is happening is that the coloring of some class is unaltered (white) when it should be green.

Possibly related info

I am using VS 2017 Professional with ReSharper Ultimate.

Ways to fix it in order from least trouble afterwards to most

• Clean solution
• Close all files
• Clean solution
• Restart Visual Studio
• Recompile all

• This did not work for me.

• Empty the symbol cache
• Tools > Options > Debugging > Symbols > EmptySymbolCache
• Open VS in admin mode

• I have not tried this yet.

• Delete the .vs folder
• Close VS
• Delete the .vs folder from your solution folder
• Start VS
• Recompile

• I have not tried this yet.

• Delete obj and bin folders
• Close VS
• Delete obj and bin folders from your project folder
• Start VS
• Recompile

• I have not tried this yet

• Delete the .user file from the project folder (may be hidden)
• This will reset the customizations you've done to the IDE
• The user file contains user preferences, such as debugging and deployment settings; used for saving and loading project preferences for a specific user.

• I haven't tried this yet.

• Run devenv.exe /resetuserdata
• Devenv.exe may be found in...
  C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE
• This will reset many of your IDE customizations, including installed plugins.
• ReSharper has to be repaired afterwards.

• This worked for me.

Source:
https://stackoverflow.com/questions/33029127/go-to-definition-cannot-navigate-to-the-symbol-under-the-caret