Rider Analysis: Errors shown despite successful compilation

Problem

Rider displays 218 errors in a .NET 9 solution even though the solution compiles successfully in Rider, Visual Studio 2026, and Visual Studio Code. This behavior occurs while using Rider 2025.3.0.3.

Cause [Optional]

Possible cache corruption or outdated analysis data in Rider.

Resolution

Clear the caches in Rider as follows:

1. Navigate to File | Invalidate caches => Invalidate and restart.
2. Allow Rider to restart and regenerate the caches.

If the issue persists:

1. Reproduce the error.
2. Collect Rider logs by following the steps in How to collect Rider logs?.
3. Provide the collected logs for further analysis.