---
title: C# SDK
slug: feature-experimentation/docs/csharp-sdk
docTags: 
createdAt: 2026-08-05T20:40:01.000Z
---

This reference guide describes using the Optimizely Feature Experimentation C# SDK.

## Version

For the current version number of this SDK, see the [SDK Compatibility Matrix](docId:2shbZfPCkPAZ0mlZpL1TU).

## Quickstart

To get started, see the C# [Quickstart](docId\:GqD16Oyh9sH37TwarqEHo).

## Reference

For reference documentation, see the left-hand menu, or begin by [installing the C# SDK](docId\:t4HfKZrY-A5Uc37TFEJeu).

### Source files

- [C# SDK repo](https://github.com/optimizely/csharp-sdk)
- [Changelog](https://github.com/optimizely/csharp-sdk/blob/master/CHANGELOG.md)