Find length of service from date of joining

hello friend,
i don't understand ur query
to calculate year,month,day try this code

        DateTime startDate = Convert.ToDateTime("10-jan-2000");
        DateTime endDate = Convert.ToDateTime("10-feb-2010");
        TimeSpan diff = endDate.Subtract(startDate);

diff calculate total days.
calculate year,month,days from this diff.

thanks

pls mark ans if help u.