The base class / collection interface of following classes have changed:
RFCParameterCollection
RFCServerFunctionCollection
RFCStructureCollection
RFCTableCollection
RFCTableColumnCollection
These classes don’t inherit from CollectionBase any more and no longer implement non-generic collection interfaces like IList. They now implement the generic IList interface.
This is a breaking change, but it shouldn't require any code adjustments in most cases.