The Gmail API SDK for .NET contains authentication and authorization with Api Keys and OAuth 2. Examples demonstrate a Google Discovery API sample along with web applications, service accounts, and installed applications.
Back in the day, you used to have to go through the arduous task of going out into the world, talking to a member of the opposite sex to determine common interests, and then make a leap of faith to begin the dating process. These days, thanks to the Foursquare API, we have a few apps that can help simplify the process.
When Twitter announced it's new Twitter API changes it left many the disgruntled third party app developer who had built tools and services on top of the API. Where many have been forced to simply work around these changes regardless of the damage caused, others will be forced to abruptly shut down. Unfortunately, the latter is true for Twimbow.