DevExpress
Have you seen this post "3rd party libraries used by Inventor" by @adam.nagy?
Jelte de Jong
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Blog: hjalte.nl - github.com
Inventor 2021 and 2022 use the DevExpress 19.1.5 libraries
Inventor 2019 and 2020 use the DevExpress 16.1.5 libraries
As Adam mentioned in the above link, they are moving to 21.1.5 for the next release.
Inventor installs the DevExpress components it uses in the windows global assembly cache at C:\Windows\Microsoft.NET\assembly\GAC_MSIL\
If you have a license for the components for development purposes you would load the references from their installed location (i.e., C:\Program Files (x86)\DevExpress 19.1\Components\Bin\Framework\...) . You would only install any components (copy local) that are not included with the Inventor installation, and only if needed by your add-in.
