calculate age with DateTime birthday C#

Program.cs

using System;
					
public class Program
{
	public static void Main()
	{
		DateTime[] birthdays = new DateTime[]
		{
			new DateTime(1995, 12, 14),
			new DateTime(2001, 1, 21),
			new DateTime(1976, 6, 4),
			new DateTime(2009, 2, 28)
		};
		
		Array.ForEach(birthdays, b => Console.WriteLine(GetAgeByDate(b)));
	}
	
	public static int GetAgeByDate(DateTime birthday)
	{
	  return Convert.ToInt16(Math.Truncate((DateTime.Today - birthday).TotalDays / 365.25));
	}
}