If you have experiences with Google Calendar, you may find that Google Contacts only supports Contact importing by CSV files or ics files. It is not convenient to convert the information to CSV because you need to specify the conversion format, the data field information and many other settings before the CSV conversion.
By our software Calendar Importer for Google, you may import Calendar information from various source step by step with a only few clicks. So the importing become much simpler.
.NET framework 2.0 or above