string[] xAxis = { "Banana", "Mango", "Apple" };

double[] Percentage = { BananaPercentage, MangoPercentage, ApplePercentage };

Color[] PieColors = { Color.Green, Color.Red, Color.Gray };

chart1.Series[0].Label = "#PERCENT";
chart1.Series[0].LegendText = "#AXISLABEL";
//chart1.Series[0].Points[0].Color = PieColors[0];
chart1.Series[0].Points.DataBindXY(xAxis, Percentage);