Andrew Troelsen wrote a great article on creating an Outlook add-in using C#. Having had to struggle to create my first C# Outlook add-in, I realized how difficult it was to create and that there was little information on MSDN. You should definitely check it out, the article includes a Console version of Pine, “OPine”.
Not only that, it also includes an Outlook COM add-in written in C#. The add-in displays rollup statistics that shows you how many emails you've sent and received over a day and month. It's a great way to track how far behind you are...
In my (non-existant) free time I want to add some more statistics to the COM add-in:
If you have other good ideas for C# articles that you can't find good information on, let me know.
PS: Thanks to Dan Crevier and Omar Shahine for reviewing the content.