title: Creating .ICS files, adding to outlook
body: <p>I am creating a simple application that will allow users to download .ICS files, and import them into their chosen calendar application/site.</p>
  
  <p>I am happy with the creation process, but have a question regarding opening them in outlook.
  (will be developed in C#, ASP.NET)</p>
  
  <p>When I open one, it adds a new calendar, and doesn't add the events to the existing calendar. </p>
  
  <p>Is it possible to open, and add to the existing calendar?
  Example from a generate ICS file below (test data obviously)</p>
  
  <pre><code>BEGIN:VCALENDAR
  VERSION:2.0
  PRODID:-//hacksw/handcal//NONSGML v1.0//EN
  BEGIN:VEVENT
  DTSTART:20100623T1101100Z
  DTEND:20100623T1401400Z
  SUMMARY: England v Slovenia
  LOCATION: Some where in South Africa
  END:VEVENT
  BEGIN:VEVENT
  DTSTART:20100624T1101100Z
  DTEND:20100624T1401400Z
  SUMMARY: England v Slovenia again (replay)
  LOCATION: Some where in South Africa
  END:VEVENT
  END:VCALENDAR
  </code></pre>