ReSharper "Cannot resolve symbol" even when project builds
Try Visual Studio → menu Tools → Options → ReSharper, Suspend button and Resume again (no need to close the window). This works in my case.
VS -> Tools -> Options -> ReSharper Suspend button
Clear Contents of -> AppData\Local\JetBrains\ReSharper\v7.1\SolutionCaches
VS -> Tools -> Options -> ReSharper Resume button
This worked for me (VS2012u4, R# 7.1.3):
- Resharper > Options > Environment: General > Clear Caches
- Restart Visual Studio
Clear Resharper cache: Resharper -> Options -> General -> Clear Caches, close and reopen the solution. It worked in R# 9.0 Update 1