---
title: "Sitecore ASP.NET Rendering SDK (legacy)"
slug: "sitecore-asp-net-rendering-sdk--legacy-"
abstract: "Overview of the Sitecore ASP.NET Rendering SDK for building rendering hosts."
---
# Sitecore ASP.NET Rendering SDK (legacy)

> [!important]
> If you integrated your app before , it's using the legacy ASP.NET Core Rendering SDK, version 22 or earlier. This SDK is no longer receiving updates, so we recommend that you [upgrade to the latest version of the new](https://doc.sitecore.com/xmc/en/developers/asp-net/latest/asp-net-core-sdk/upgrade-from-v22.html) .

The Sitecore ASP.NET Rendering SDK offers a starting point for the rendering of Sitecore content.

- [Headless development with the ASP.NET Rendering SDK](https://doc.sitecore.com/xp/en/developers/hd/21/sitecore-headless-development/headless-development-with-the-asp-net-rendering-sdk.html "Headless development with the ASP.NET Rendering SDK")
- [Sitecore Layout Service](https://doc.sitecore.com/xp/en/developers/hd/21/sitecore-headless-development/sitecore-layout-service.html "Sitecore Layout Service")
- [ASP.NET Core Rendering Engine](https://doc.sitecore.com/xp/en/developers/hd/21/sitecore-headless-development/asp-net-core-rendering-engine.html "ASP.NET Core Rendering Engine")
- [Sitecore ASP.NET Rendering SDK API (legacy)](https://doc.sitecore.com/xp/en/developers/hd/21/sitecore-headless-development/sitecore-asp-net-rendering-sdk-api--legacy-.html "Sitecore ASP.NET Rendering SDK API (legacy)")