How to Calculate age from Date of Birth in C#

DateTime dob = Convert.ToDateTime("1988/12/20");
string text = CalculateYourAge(dob);
int age = CalculateAge(dob);

/// <summary>
/// For calculating age
/// </summary>
/// <param name="Dob">Enter Date of Birth to Calculate the age</param>
/// <returns> years, months,days, hours...</returns>
static string CalculateYourAge(DateTime Dob) {
    DateTime Now = DateTime.Now;
    int Years = new DateTime(DateTime.Now.Subtract(Dob).Ticks).Year - 1;
    DateTime PastYearDate = Dob.AddYears(Years);
    int Months = 0;
    for (int i = 1; i <= 12; i++) {
        if (PastYearDate.AddMonths(i) == Now) {
            Months = i;
            break;
        } else if (PastYearDate.AddMonths(i) >= Now) {
            Months = i - 1;
            break;
        }
    }
    int Days = Now.Subtract(PastYearDate.AddMonths(Months)).Days;
    int Hours = Now.Subtract(PastYearDate).Hours;
    int Minutes = Now.Subtract(PastYearDate).Minutes;
    int Seconds = Now.Subtract(PastYearDate).Seconds;
    return String.Format("Age: {0} Year(s) {1} Month(s) {2} Day(s) {3} Hour(s) {4} Second(s)",
    Years, Months, Days, Hours, Seconds);
}

Age: 26 Year(s) 5 Month(s) 5 Day(s) 16 Hour(s) 56 Second(s)

 /// <summary>
/// For calculating only age
/// </summary>
/// <param name="dateOfBirth">Date of birth</param>
/// <returns> age e.g. 26</returns>
private static int CalculateAge(DateTime dateOfBirth)
{
    int age = 0;
    age = DateTime.Now.Year - dateOfBirth.Year;
    if (DateTime.Now.DayOfYear < dateOfBirth.DayOfYear)
        age = age - 1;

    return age;
}

age= 26