Please see the comments attached to
The bottom line is that the underlying new C++ messaging API provides less functionality than the older client API for 0-10 in a number of important areas. The .NET binding is necessarily similarly constrained.
As I understand it, there is a desire to eventually enhance the C++ API to provide the missing bits described in the thread. But in the 0.7 time frame, this appears to be the most sensible route to add the functionality and simultaneously ease the future switch to the messaging C++ API.