---
title: "ExtensionModel"
description: "ExtensionModel"
url: "https://www.contentstack.com/docs/developers/sdks/content-management-sdk/dot-net/reference/extensionmodel"
product: "Contentstack"
doc_type: "guide"
audience:
  - developers
  - admins
version: "current"
last_updated: "2026-09-04"
---

# ExtensionModel

## ExtensionModel

Extension model for creating or updating extensions.

Config for the extension.

DataType for the extension.

Set true for multiple extension.

Scope for the extension.

Source code for the extension.

Doc for the extension.

List of tags to be added to extension.

Extension title for giving name to extension.

Extension type like custom field, widget, or dashboard.

## ExtensionModel | .NET Management SDK | Contentstack

ExtensionModel provides the structure used to create or update extensions in Contentstack.