Reproduction steps:
1. Open the attached “RiderTest” project
2. Open the “Assets/SomeExampleComponent.cs” script with Rider 2023.3.4 or newer
3. Observe the warning in line 18
4. Uncomment lines 14 or 15 to try to solve the warning and save the script
5. Observe the Console logs in the Editor
Expected Result: No errors are thrown
Actual Result: “The type or namespace name 'MustDisposeResource' does not exist in the namespace 'JetBrains.Annotations'“ error is thrown
Reproducible with: 2021.3.40f1, 2022.3.37f1, 6000.0.10f1
Reproducible on: Windows 11 Pro
Not reproducible on: No other environments tested