Several important resources regrading the Google APIs client library for .NET:

1. http://peleyal.blogspot.com/ My personal blog
2. http://google-api-dotnet-client.blogspot.com/ The .NET client library's announcements
3. http://developers.google.com/api-client-library/dotnet/ Documentation in developers.google.com
4. https://www.nuget.org/packages?q=Google.Apis All Google APIs NuGet packages
5. https://github.com/google/google-api-dotnet-client The core Google APIs projects