Foreach statement cannot operate on variables of type 'system.data.datatable'

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C#

.NET

after i convert a datatable into a list
its shows a error

var datas = dtcombo;
                               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.total.value);
                                           ax.Labels.Add(x.year.ToString());

                                       }

its for bind the datatable values to a livechart
please help

What I have tried:

using foreach its shows error

foreach statement cannot operate on variables of type 'system.data.datatable'...