Rider Project Indexing Issue - All Folders Show "no index" (After Rider Upgrade to 2025.2.2)

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Sdlarsen
Created

After upgrading Rider to the latest version, all folders in one specific .NET 6.0 project show "- no index" in Solution Explorer. Files exist and have proper permissions, but Rider cannot index folder contents. IntelliSense and navigation are completely broken.

Key Details:

  • Other projects in Rider work perfectly fine - this appears to be isolated to one specific project
  • Issue appeared immediately after upgrade to Rider 2025.2.2, not macOS upgrade
  • macOS 26 upgrade happened earlier without any issues

Environment

  • macOS: 26 (upgraded earlier, no issues)
  • Rider: Latest version, 2025.2.2 (issue started immediately after this upgrade)
  • Project: .NET 6.0 SDK-style project (yes yes I know, .NET 6 is deprecated)

What I've Verified

  1. Files exist: Command line shows all folders and files with proper permissions
  2. Project structure intact: All expected folders and files present
  3. Project file valid: Standard SDK-style format, no corruption
  4. Other projects work: This issue is isolated to one specific project

Troubleshooting Steps Attempted

Standard Rider Fixes

  • Invalidate Caches and Restart (multiple times)
  • Downgrading to previous Rider version: No luck there, indexing issue persists
  • Project Reload: Unload/Reload project
  • Memory Settings: Increased heap to 4GB
  • Complete cache reset: Deleted .idea folder entirely

System-Level Fixes

  • NuGet Cache: Cleared all caches (dotnet nuget locals all --clear)
  • Build Artifacts: Deleted bin/ and obj/ folders
  • Privacy Settings: Verified Full Disk Access and other permissions
  • Terminal Launch: Launched Rider from Terminal

Key Observations

  • Command line tools can access all files normally
  • dotnet clean works fine
  • Issue started immediately after Rider upgrade (not macOS upgrade)
  • Other projects in Rider work normally - issue is project-specific

This appears to be a regression in the latest Rider version affecting specific project configurations. Has anyone else experienced similar project-specific indexing failures after recent Rider updates?

 

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Dmitry Kazantsev
Created

Hello,

That sounds weird.

  • Do you open .sln or .slnx?
  • What are these directories? Are there .cs files inside?

  • Is the “New Files View” enabled? (Does switching it and restarting Rider fixes the problem?)

  • Are there other, non-affected projects under the same solution?
  • That would be helpful if you could share a directory structure of your solution and screenshots demonstrating the issue and the place of impacted files in a solutoin tree.

Have a nice day!

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