.net google calendar

https://developers.google.com/gdata/client-cs

http://www.codeproject.com/Articles/64474/How-to-Read-the-Google-Calendar-in-C  recommend

https://code.google.com/p/google-api-dotnet-client/wiki/Downloads

http://www.cnblogs.com/dudu/archive/2011/09/14/2176525.html