Get Contact Fields from Incident Workspace add-in

Summary

Get Contact Fields from Incident Workspace addin

Content

Hi All,

I have been struggling to figure out if one can get the name of the primary contact assigned to an incident without using a SOAP call in C#.  I have been able to get the primary contact id using IInc2Contact but then don't see how I can get the rest of the contact fields as they are not a property here.  When I try and pass the Contact ID to IContact it is blocked as a read only field. 

I am trying not to use soap as there are already other connections happening and trying to minimise wait times for end user if possible.  Is the above possible if the add-in is on the incident workspace?