When using the Application Programming Interface (API) for C#, only .net framework 4.8 is supported. This version is getting quite old. i.e. released 2019
When will the C# API support .NET 8? Is this in the pipeline of future updates for MathCAD Prime
PTC product management and R&D have been actively discussing the next version of .NET that Mathcad Prime should support, but we don't have timelines or other announcements or commitments we can make right now.
I manage the Creo and PTC Mathcad YouTube channels for PTC, as well as all PTC Mathcad marketing in general.