C:\Program Files\Autodesk\Inventor [Version]\Bin\Public Assemblies\Autodesk.Inventor.Interop.dll
Thanks to the GAC, an add-in compiled with an older version of the interop DLL (like the one from Inventor 2018) will typically run on newer versions (2019, 2020, etc.) without being recompiled, provided it does not use any newly introduced API functions. The .NET runtime is designed to find and load the correct version. autodesk.inventor.interop.dll
For more information, it is highly recommended to explore the official Autodesk Inventor API help documentation and participate in the Autodesk Inventor Programming/iLogic Forum for real-world examples and expert advice. If you'd like to dive deeper, I can help you: If you'd like to dive deeper, I can
is a critical dynamic-link library (DLL) file that serves as the bridge between external applications (such as .NET languages like C# or VB.NET) and the Autodesk Inventor COM-based Application Programming Interface (API). For engineers, CAD managers, and software developers looking to automate repetitive design tasks, extend Inventor’s functionality, or integrate Inventor with other systems (like ERP or PDM), understanding this library is the first step toward advanced customization. If you'd like to dive deeper
