## The symptom
In a Blazor client app, GrowthBook `EvalFeature` always returns value source
`defaultValue` even when the SDK payload contains rules, e.g. a force rule for
the flag. The same feature JSON evaluates correctly in other SDKs, so it is
specific to the C# SDK.
## The fix
This was a bug in the GrowthBook C# SDK, fixed and released on NuGet as v1.0.5.
Upgrade the package and `EvalFeature` evaluates rules correctly. The reporter
confirmed the scenario works after upgrading.
## How to tell it is this bug
- `EvalFeature` returns `defaultValue` source for every flag.
- The payload demonstrably contains rules (check the raw feature JSON).
- Other GrowthBook SDKs evaluate the same JSON correctly.
Same JSON, different SDK, different result: that is always an SDK bug, and the
fix is a version bump.