title: Reset value of WPF Toolkit datepicker to 'default' value
body: <p>When I first open my window that uses the wpf toolkit datepicker it has today's date highlighted in the calendar but nothing in the associated textbox (expect a water mark of mm/dd/yyy).</p>
  
  <p>I want to reset the datepick to that initial state after a user selects a date and "submits" so when they use it again it not at the date they previously selected.  So for example if a person selected a date 2 months from now, when it is reset the text box is the mm/dd/yyyy watermark and when the calendar is opened it starts with today's date as the 'starting date'.</p>
  
  <p>I've tried various combinations of the following but this doesn't reset the text:</p>
  
  <pre><code>//set date to today so it move the calendar to this date
  mydatepicker.SelectedDate = DateTime.Now;
  //reset since we don't want a date selected
  mydatepicker.SelectedDate = null;
  //reset the text
  mydatepicker.Text = string.Empty;
  </code></pre>
  
  <p>If i reset just the text the calendar (selected date\starting) is not reset.  But if i set the calendar the text is updated and not long just the  watermark.</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks</p>