---
title: CSharp-SDK - 3.9.1
slug: feature-experimentation/release-notes/csharp-sdk-3-9-1
docTags: 
createdAt: 2026-07-20T15:45:31.198Z
---

### Bug Fixes:

\- Duplicate experiment key issue with multiple feature flags. While trying to get variation from the variationKeyMap, it was unable to find because the latest experimentKey was overriding the previous one. \[#267]\([https://github.com/optimizely/csharp-sdk/pull/267](https://github.com/optimizely/csharp-sdk/pull/267))

[https://github.com/optimizely/csharp-sdk/releases/tag/v3.9.1](https://github.com/optimizely/csharp-sdk/releases/tag/v3.9.1)