SDK 2.0 is currently a "development" level product, which may be equal to an "alpha" in development terms, and so it is an ongoing project rather than a finished package. Person Tracking is apparently not yet in its feature set. However, since the RealSense SDK For Linux (which uses Librealsense as one of its modules) does support Person Tracking via its 'Person Library', there is the potential for it to be adapted for SDK 2.0.
I believe the aim in making the new SDK cross-platform and open source is to encourage an ecosystem where developers create tools themselves and share them with the community.
There is an existing Person Tracking module made by an independent developer for use with Librealsense and ROS. As SDK 2.0 is a development branch of Librealsense, this module may perhaps be usable with SDK 2.0 or adaptable for it.
Regarding C# support, the 2.0 SDK's overview statement says, "We provide a C, C++, Python and Node.js API."