How to scroll Silverlight DataGrid with mouse wheel

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1. using System.Windows.Automation.Provider;  
2. using System.Windows.Automation;  
3.   
4. public class ScrollableDataGrid : DataGrid  
5. {       
6.   public ScrollableDataGrid()  
7.   {  
8.     MouseWheel += delegate(object sender, MouseWheelEventArgs e)  
9.     {  
10.       (OnCreateAutomationPeer() as IScrollProvider).Scroll(ScrollAmount.NoAmount,  
11.         e.Delta < 0 ? ScrollAmount.SmallIncrement : ScrollAmount.SmallDecrement);  
12.     };  
13.   }  
14. }  

using System.Windows.Automation.Provider;
using System.Windows.Automation;

public class ScrollableDataGrid : DataGrid
{     
  public ScrollableDataGrid()
  {
    MouseWheel += delegate(object sender, MouseWheelEventArgs e)
    {
      (OnCreateAutomationPeer() as IScrollProvider).Scroll(ScrollAmount.NoAmount,
        e.Delta < 0 ? ScrollAmount.SmallIncrement : ScrollAmount.SmallDecrement);
    };
  }
}