How to get the total number of days in a year from the given date
should do the trick
int daysLeft = new DateTime(DateTime.Now.Year, 12, 31).DayOfYear - DateTime.Now.DayOfYear;
Perhaps just:
DateTime.IsLeapYear(DateTime.Now.Year) ? 366 : 365
Sorry, read it as if you just wanted the number of days in current year...
Let's say the date is today:
var user = "05-08-2012";
var date = DateTime.ParseExact(user, "MM-dd-yyyy", System.Globalization.CultureInfo.InvariantCulture);
var lastdate = new DateTime(date.Year, 12, 31);
var diff = lastdate - date;
diff.TotalDays
contains the number of days (thanks @Tung). lastdate
also contains the last date for the year.