Hi, I figured it out by googling and looking around code samples....here is the code....

private void xamTabControlDrillDown_SelectionChanged(object sender,SelectionChangedEventArgs e)

        {

            if (e.AddedItems.Count > 0)

            {

                if (this.tabItemGraph != null && this.tabItemGraph.IsSelected &&

                    this.XamDataGridDrillDown.Records.DataPresenter.GroupByArea.GroupedFieldLabels.Count > 0)

                {

                    IList<Data> list = new List<Data>();

                    GroupByRecordCollection groupByRecords = this.XamDataGridDrillDown.Records as GroupByRecordCollection;

                    foreach (GroupByRecord gbr in groupByRecords)

                    {

                        ///int count = CountDataRecords(gbr);

                        foreach (Record child in gbr.ViewableChildRecords)

                        {

                            SummaryRecord summaryRecord = child as SummaryRecord;

                            if (null != summaryRecord && summaryRecord.SummaryResults != null)

                            {

                                IEnumerable<SummaryResult> sr = summaryRecord.SummaryResults;

                                foreach (SummaryResult sResult in sr)

                                {

                                    Data data = new Data() { Type = (String)gbr.Value, 

                                                             Count = (Decimal)sResult.Value,

                                                             Tooltip = (String)gbr.Value + " " + sResult.Value.ToString() };

                                    list.Add(data);

                                }

                            }

                        }

                    }

                    xamChartDrillDown.RefreshEnabled = false;

                    xamChartDrillDown.Caption.Text = "Transactions Grouped By "+ this.XamDataGridDrillDown.Records.DataPresenter.GroupByArea.GroupedFieldLabels[0].Field.Label.ToString();

                    xamChartDrillDown.Series[0].DataSource = list;

                    xamChartDrillDown.Series[0].DataMapping = "Value=Count;Label=Type;ToolTip=Tooltip";

                    xamChartDrillDown.RefreshEnabled = true;

                    xamChartDrillDown.Refresh();

                }

            }

        }

Hi Alex, I did see that example but what I need is for Heirarchical XDG, thats where I am really looking for an example. If you look at my screen shot the summary results I need to get hold of for the Heirarchical level too. Hope you can provide a code snippet or point to an good example for that!.

Thanks

Ganesh