How to find is DataGrid have Scroll Bars in WPF?

One of my WPF application was using a DataGrid and I needed to find out at a certain point of time whether the Scroll Bar (vertical or horizontal) is visible or not. If you ever run into scenario like this you can find this out using code given below.

   1:  ScrollViewer scrollViewer = FindVisualChild<ScrollViewer>(dataGrid);

   2:  Visibility verticalBarVisibility = scrollViewer.ComputedVerticalScrollBarVisibility;

   3:  Visibility horizontalBarVisibility = scrollViewer.ComputedHorizontalScrollBarVisibility;

In code snippet above 'dataGrid' is my DataGrid.

   1:  private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject

   2:  {

   3:       for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)

   4:       {

   5:            DependencyObject child = VisualTreeHelper.GetChild(obj, i);

   6:            if (child != null && child is childItem)

   7:                 return (childItem)child;

   8:            else

   9:            {

  10:                childItem childOfChild = FindVisualChild<childItem>(child);

  11:                if (childOfChild != null)

  12:                     return childOfChild;

  13:            }

  14:       }

  15:  return null;

  16:  }

After running this piece of code in 'verticalBarVisibility' and 'horizontalBarVisibility' you will have the exact state of DataGrid's vertical and horizontal scroll bars.