test.cs

// create a new chart control
Chart chart = new Chart();

// add a chart area
chart.ChartAreas.Add("chartArea1");

chart.Series.Add("series1");
chart.Series["series1"].ChartArea = "chartArea1";
chart.Series["series1"].ChartType = SeriesChartType.Bar;

// connect to a data source
DataSet ds = new DataSet();
ds.ReadXml("data.xml");

chart.Series[0].XValueMember = ds.Tables[0].Columns[0].ColumnName;
chart.Series[0].YValueMembers = ds.Tables[0].Columns[1].ColumnName;

chart.DataSource = ds.Tables[0];
chart.DataBind();

// create a chart frame
TXTextControl.DataVisualization.ChartFrame frame =
  new TXTextControl.DataVisualization.ChartFrame(chart);

frame.Name = "points";

// add chart to the document
textControl1.Charts.Add(frame, -1);