ChartEngine engine = new ChartEngine();

ChartCollection charts = new ChartCollection(engine);     

engine.Size = new Size(350, 400);

engine.Charts = charts;

engine.Title = new ChartText();

if (questions.Questions[0].IsParentQuestionIdNull()) {

  engine.Title.Text = Server.HtmlDecode(

          Regex.Replace(questions.Questions[0].QuestionText, "<[^>]*>", " "));

} else {

  String questionText = String.Format("{0} - {1}",

                      questions.Questions[0]["ParentQuestionText"].ToString(),

                      questions.Questions[0].QuestionText);

  questionText = questionText.Replace(Environment.NewLine, "");

  questionText = questionText.Replace("\t", "");

  questionText = questionText.Replace("<p>", "");

  questionText = questionText.Replace("</p>", "");

  engine.Title.Text = Server.HtmlDecode(

                                 Regex.Replace(questionText, "<[^>]*>", " "));

}

PieChart pie = new PieChart(data);

engine.Charts.Add(pie);

ChartLegend legend = new ChartLegend();

legend.Position = LegendPosition.Bottom;

engine.HasChartLegend = true;

engine.Legend = legend;

engine.GridLines = GridLines.None;