title: How to add file attachments to appointment using EWS?
body: <p>I'm developing application which uses EWS managed API to send appointments to outlook recipients,
  Now there are requirement to add attachments to appointment, I'm  able  to attach attachments to emails, but when I use same technique as attaching item attachments to email ,but attachments are not attaching, my code as below </p>
  
  <pre><code>       public string sendCalanderEvntAsReply( EntityLayer.Data_Contracts.AppointmentDTO appointment)
         {
  
                 Appointment app = new Appointment(service);
                 app.Subject = appointment.Subject;
                 app.Body = appointment.Body;
                 app.Start = Convert.ToDateTime(appointment.Start);
                 app.End = Convert.ToDateTime(appointment.End);
                 app.Location = appointment.Location;
  
                 foreach (string obj in appointment.Attendees)
                 {
                     app.RequiredAttendees.Add(obj);
                 }
  
                 if (appointment.Attachments != null &amp;&amp;
                     appointment.Attachments.Count &gt; 0)
                 {
                     foreach (var att in appointment.Attachments)
                     {
                         app.Attachments.AddFileAttachment(att.FileName);
                     }
                 }
  
                 app.Save(SendInvitationsMode.SendToAllAndSaveCopy);       
  }
  </code></pre>
  
  <p>is there any issue in my code?
  please help.</p>
  
  <p>thanks</p>