How to set Calendar and Get INfo from That in .net

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;
using System.Collections;

namespace CalanderMethod
{
class Program
{
static void Main(string[] args)
{
List list = new List();
DateTime dt = new DateTime(1900,2,29 ,new JulianCalendar());
HijriCalendar hj = new HijriCalendar();
list.Add(hj.GetYear(dt).ToString());
list.Add(Convert.ToString(hj.GetMonth(dt)));
list.Add(hj.GetMonth (dt).ToString());
list.Add(hj.GetDaysInYear(dt.Year).ToString());
list.Add(hj.GetDayOfYear (dt).ToString());
Console.WriteLine("{0}-this is leap year in Julian Calendar ", dt);
Console.WriteLine("the following information under HIJRI CALANDER");
foreach (var item in list)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
}