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    <p>I couldn't fit this in a comment -- try this:</p> <pre><code>public class BackgroundTransferRequestWrapper : INotifyPropertyChanged { private BackgroundTransferRequest _request; public BackgroundTransferRequestWrapper(BackgroundTransferRequest request) { _request = request; _request.TransferProgressChanged += OnTransferProgressChanged; } private void OnTransferProgressChanged(object sender, BackgroundTransferEventArgs e) { BytesReceived = _request.BytesReceived; TotalBytesToReceive = _request.TotalBytesToReceive; } private long bytesReceived = 0; public long BytesReceived { get { return bytesReceived; } set { bytesReceived = value; OnPropertyChanged(); } } private long totalBytesToReceive = 0; public long TotalBytesToReceive { get { return totalBytesToReceive; } set { totalBytesToReceive = value; OnPropertyChanged();} } public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null) { PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName)); } } </code></pre> <p>Instead of resetting the ItemsSource on a timer, instead just do this:</p> <pre><code> foreach (var request in BackgroundTransferService.Requests) { Requests.Add(new BackgroundTransferRequestWrapper(request)); } </code></pre> <p>In this example, <strong>Requests</strong> is an ObservableCollection bound to your ItemsSource. With this you shouldn't need to update manually at all -- the BackgroundTransferRequest events will drive the wrapper to notify prop changes as they happen.</p> <p>I didn't test your example fully, but I suspect your issue has something to do with LongListSelector's UI virtualization and the way you're constantly resetting ItemsSource. Another possibility is the order of the requests might change every time you get them from BackgroundTransferService.</p> <p>Good luck!</p>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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