title: GetDayOfWeek in specific calender(PersianCalender) in C#
body: <p>i want to get DayOfWeek in persianCalnder but it is always same as Georgian Calender,   </p>
  
  <pre><code>       DateTime today = DateTime.Today;
         PersianCalendar pc = new PersianCalendar();
  
       var  geDayOfWeek= today.DayOfWeek;             
       var pcDayOfWeek=pc.GetDayOfWeek(today);
  </code></pre>
  
  <p>why the value of geDayOfWeek and pcDayOfWeek are always the same ? 
  persian week starts in Saturday not Monday , so  for example Sunday should be 2 not 0 .</p>
  
  <p>any solution to get day number in Persian calendar ?</p>
  
  <p>i need this to calculate start date and end date  of week  in Persian Calendar not Georgian Calendar.</p>