The idea can be as simple as following-
1. You can get a date value from the calendar
2. Then just extract the year from that using
Year property.
Example:
If you are using ASP.Net calendar control,
int requiredYear = Calendar1.SelectedDate.Year;
If this approach doesn't work for you, please share what you have tried so that we will try to suggest, why that doesn't work.
Thanks.