title: How to save a datetime (date) in NSUserDefaults.StandardUserDefaults?
body: <p>Or there other ways than storing a date as string?</p>
  
  <pre><code>// read date
  string dateString = NSUserDefaults.StandardUserDefaults.StringForKey ("MY_DATE");
  myDate = new DateTime ();
  myDate = DateTime.ParseExact (dateString, "dd.MM.yyyy", null);
  
  // write date
  NSUserDefaults.StandardUserDefaults.SetString (myDate.Value.ToString ("dd.MM.yyyy"), "MY_DATE");  
  </code></pre>