Hi Gayathri, Did you find a solution ? I've the same problem.
When I add refernce to mongodb c# driver this raise error during build
Unable to resolve dependency mongocsharpdriver 2.2.0
1>C:\progetti\bluemix\bocconibeta\src\dotnetstarter\project.lock.json(1): error NU1006: Dependencies in project.json were modified. Please run "dnu restore" to generate a new lock file.
1>C:\progetti\bluemix\bocconibeta\src\dotnetstarter\project.json(14,26): error NU1001: The dependency mongocsharpdriver >= 2.2.0 could not be resolved.
Thanks for help