Big solution, many projects… suddenly IntelliSense feels drunk. Root cause Visual Studio keeps: Symbol cache per project Roslyn analysis results Design-time builds running in background These accumulate and slow down parsing. Fix (safe & underrated) Disable design-time builds for large solutions Clear ComponentModelCache periodically %LOCALAPPDATA%\Microsoft\VisualStudio\<version>\ComponentModelCache Why it works Forces VS to rebuild symbol graphs cleanly.
