: It is the foundation for creating both "Out-of-Process" executables (standalone apps) and "In-Process" Add-ins that run directly inside Inventor's memory space.
It is often referred to as the Primary Interop Assembly (PIA). COM Wrapper: It wraps the Inventor.exe COM type library. autodesk.inventor.interop.dll
It is typically found in the Inventor installation folder, often under C:\Program Files\Autodesk\Inventor 20XX\bin . : It is the foundation for creating both
Inventor is a single-threaded COM application. Any external standalone Windows Form or WPF application communicating with the interop assembly must be decorated with the [STAThread] attribute on its entry point to prevent cross-threading marshaling errors. Final Thoughts: Choosing the Right Layer autodesk.inventor.interop.dll