ScrollToTop DataGrid WPF

WPF> DataGrid > Scroll To Top

var border = VisualTreeHelper.GetChild(myDataGrid, 0) as Decorator;

if (border != null && border.Child !=null)

{

  var scrollViewer = border.Child as ScrollViewer;

  if (scrollViewer != null)

  {

    scrollViewer.ScrollToTop();

  }

}