private void BackersGridView_OnLoaded(object sender, RoutedEventArgs e)
{
var scrollbars = MainScrollViewer.GetDescendantsOfType <ScrollBar>().ToList();
var bar = scrollbars.FirstOrDefault(x => x.Orientation == Orientation.Horizontal);
if (bar != null)
{
bar.Scroll += BarScroll;
}
MainScrollViewer.ViewChanged += MainScrollViewerOnViewChanged;
}