“WPF Scoll на новый элемент DataGrtid” Ответ

WPF Scoll на новый элемент DataGrtid

if (mainDataGrid.Items.Count > 0)
{
    var border = VisualTreeHelper.GetChild(mainDataGrid, 0) as Decorator;
    if (border != null)
    {
        var scroll = border.Child as ScrollViewer;
        if (scroll != null) scroll.ScrollToEnd();
    }
}