I'm breaking a large app into projects and have come across a problem
Applications in project A and B pass dataset DS as an argument to a parameter in a function in project C.

All three projects have their own DS.

That worked fine when they were all in one project, but when I pass the dataset DS from project A to project C, there are different namespaces and I get a message saying that the dataset can't be converted.

For a lot of reasons, I'd like to keep each project with its own DS.

I can actully copy the data to DS for project C before calling the function and pass that as the argument but that seems kludgy.
How best to handle the conversions so that project see sees the data from A and B?