public void LoadTransfers()
{
var requests = BackgroundTransferService.Requests.Select(TransferMonitorViewModel.Create).ToList();
if (Transfers == null)
{
Transfers = new ObservableCollection <TransferMonitorViewModel>(requests);
}
else
{
var newRequests = requests.Except(Transfers).ToList();
Transfers.AddRange(newRequests);
}
}