Simon Elliston Ball has an excellent presentation for using MongoDB in the .NET world.
View all the demo code on GitHub.
All the resources
The MongoDB C Sharp Language Center
A tutorial on the driver from MongoDB themselves
A good walkthrough on MongoDB with ASP.NET MVC
The online courses from MongoDB Inc that a few people asked me about
A MongoDB plugin for Glimpse
Check out the bonus Glimpse plugin, also on GitHub. This is a very basic plugin, but should go some way to answering the questions about profiling.