Execute Dynamo Script Through Revit API (Multiple Versions of Revit and/or Dynamo)

[EATREVITPOOPCAD]

https://forums.autodesk.com/t5/revit-api-forum/dynamo-script-in-revit-api/m-p/9087871#M41897

Found this great example here on how to run Dynamo scripts through c# addins. However, this only works if you have one version of dynamo installed. I would like to try to be able to run a script through my addin on multiple versions of Revit and have a couple of versions of dynamo installed...

I am assuming having the plugin work for multiple versions of Revit would be easy, just conditionally reference all of the Dynamo DLLs based on Revit version and/or .NET framework... Logically makes sense to me, but if I could have one of the wizards here confirm that, it would be nice...

The second question is more challenging for me, having this example, what do I have to do to be able to execute a script with multiple versions of Dynamo installed...

Here are some facts I discovered about Dynamo & Revit:

• Up to Revit 2019, Dynamo Core & Dynamo For Revit installed in Dynamo Program Files
• Revit 2020 and up, Dynamo Core & Dynamo For Revit are installed in the Revit Program Files Addins folder...

[jeremy_tammik]

This is probably more of a .NET question than Revit API.

Dynamo uses the Revit API .NET interface, just like all Revit add-ins.

All Revit API clients are loaded into one single AppDomain.

https://docs.microsoft.com/en-us/dotnet/api/system.appdomain

I assume you can use the methods it provides to determine what DLLs are loaded and what version of Dynamo or other clients you can communicate with.