using System;

public class Program

{

    public static void Main()

    {

                //Your DateTimevalue here

                var myDate = new DateTime(1987, 04, 15);

                DateTime birthDate;

                //Convert to date using TryParse to ensure that date is in valid format

                if (DateTime.TryParse(myDate.ToString(), out birthDate))

                {

                    //Calculate age here

                    TimeSpan age = DateTime.Now - birthDate;

                    int ageval = (int)(age.Days / 365.25);

                    Console.WriteLine(ageval);

                }

    }

}

​

​