private async void OnTakePhotoClick(object sender, RoutedEventArgs e)
{
    //Take photo or video
    CameraCaptureUI cameraCapture = new CameraCaptureUI();          
    StorageFile media = await cameraCapture.CaptureFileAsync(CameraCaptureUIMode.PhotoOrVideo);


    //add todo item to trigger insert operation which returns item.SAS
    var todoItem = new TodoItem() { Text = "test image", ImageName = media.Name };
    await todoTable.InsertAsync(todoItem);
    items.Add(todoItem);


    //TODO: Upload image direct to blob storage using SAS
}