static void FillAppointmentsStorage(AppointmentCollection c, string fileName)
 {
     using (Stream stream = GetFileStream(fileName)) {
         c.ReadXml(stream);
         stream.Close();
     }
 }
 static void FillStorageCollection(AppointmentCollection c, string resourceName)
 {
     using (Stream stream = GetResourceStream(resourceName)) {
         c.ReadXml(stream);
         stream.Close();
     }
 }
 static void FillAppointmentsStorage(AppointmentCollection c, string fileName)
 {
     using (var _stream = GetFileStream(fileName))
         c.ReadXml(_stream);
 }