Duration Calculator Between Two Dates Using ASP.Net C#

if (txt_LeaveFrom.Text != "" && txt_LeaveTo.Text != "")  

{      

DateTime FromYear = Convert.ToDateTime(clsObjCommon.GetDateForDB(txt_LeaveFrom.Text));

DateTime ToYear = Convert.ToDateTime(clsObjCommon.GetDateForDB(txt_LeaveTo.Text));

//Creating object of TimeSpan Class  

TimeSpan objTimeSpan = ToYear - FromYear;

//years  

int Years = ToYear.Year - FromYear.Year;

//months  

int month = ToYear.Month - FromYear.Month;

//TotalDays  

double Days = Convert.ToDouble(objTimeSpan.TotalDays);

//Total Months  

int TotalMonths = (Years * 12) + month;

//Total Hours  

double TotalHours = objTimeSpan.TotalHours;

//Total Minutes  

double TotalMinutes = objTimeSpan.TotalMinutes;

//Total Seconds  

double TotalSeconds = objTimeSpan.TotalSeconds;

//Total Mile Seconds  

double TotalMileSeconds = objTimeSpan.TotalMilliseconds;

}