---
title: CSharp-SDK - v1.3.1
slug: feature-experimentation/release-notes/csharp-sdk-v1-3-1
createdAt: 2026-07-20T15:45:12.985Z
---

1.3.1
February 14, 2018

Bug Fixes
Change 'murmurhash' to 'murmurhash-signed' in OptimizelySDK.nuspec fixing:
System.IO.FileLoadException 'Could not load file or assembly 'MurmurHash, ... PublicKeyToken ...'

[https://github.com/optimizely/csharp-sdk/releases/tag/v1.3.1](https://github.com/optimizely/csharp-sdk/releases/tag/v1.3.1)