チャートの円グラフに表示される線を設定し、パーセントを表示します

 chart1.Series ["serYearPlay"]。Points.DataBindXY（xvar、yvar）;
            chart1.TextAntiAliasingQuality = TextAntiAliasingQuality.High;
            this.chart1.Series ["serYearPlay"]。Label = "#VALX（#PERCENT）"; // "#PERCENT";
            this.chart1.Series ["serYearPlay"]。LegendText = "#VALX";
            chart1.Series ["serYearPlay"] ["PieLabelStyle"] = "OutSide";