System.data.datarow does not contain defenition......

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C#

.NET

iam using a datatable bind the values to live chart

DataTable dtcombo = new DataTable();
dtcombo = objG.GraphReport();

 var datas = dtcombo.AsEnumerable();
                                ColumnSeries col = new ColumnSeries() { DataLabels = true, Values = new ChartValues<int>(), LabelPoint = Point => Point.Y.ToString() };
                                Axis ax = new Axis() { Separator = new Separator() { Step = 1, IsEnabled = false } };
                                ax.Labels = new List<string>();
      
                                        foreach (var x in  datas)
                                        {
                                            col.Values.Add(x.particulars.ToString());
                                            ax.Labels.Add(x.year.ToString());

                                        }

but shows a error at these position

col.Values.Add(x.particulars.ToString());
 ax.Labels.Add(x.year.ToString());

its shows system.data.datarow does not contain defenition.....

anybody knows please help me...

What I have tried:

tried datatable converted to list