How to Calculate Days difference Between two Dates in C#

DateTime fromdt = dtpFromDate.Value.Date;

DateTime todt = dtpToDt.Value.Date;

int fday = fromdt.Day;

int fmonth = fromdt.Month;

int fyear = fromdt.Year;

DateTime oldDate = new DateTime(fyear, fmonth, fday);

TimeSpan ts = todt - oldDate;

int differenceInDays = ts.Days;

MessageBox.Show(differenceInDays.ToString());