# .NET Compatibility

The table below shows which .NET version each major Dynamo release series targets. This is relevant when building packages or extensions, as your project must target a compatible .NET version.

| Dynamo Version | .NET Version       |
| -------------- | ------------------ |
| 0.9 – 2.0      | .NET Framework 4.5 |
| 2.1 – 2.6      | .NET Framework 4.7 |
| 2.7 – 2.19     | .NET Framework 4.8 |
| 3.0 – 3.6      | .NET 8             |
| 3.3.2          | .NET 10            |
| 3.7            | .NET 10            |
| 4.0+           | .NET 10            |

{% hint style="info" %}
3.3.2 and 3.7 are special releases with .NET 10 backported from the 4.0 release candidate.
{% endhint %}

For guidance on updating your packages to a new .NET version, see the migration guides in the Developer Primer:

* [Updating Packages for Dynamo 2.x](/1_developer_primer_intro/3_developing_for_dynamo/6-0-updating-your-packages-and-dynamo-libraries-for-dynamo-2x.md)
* [Updating Packages for Dynamo 3.x / .NET 8](/1_developer_primer_intro/3_developing_for_dynamo/6-1-updating-your-packages-and-dynamo-libraries-for-dynamo-3x-net8.md)
* [Updating Packages for Dynamo 4.x / .NET 10](/1_developer_primer_intro/3_developing_for_dynamo/6-2-updating-your-packages-and-dynamo-libraries-for-dynamo-4x.md)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://primer2.dynamobim.org/a_appendix/dotnet-compatibility.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.