.net图表控件:添加和删除其他系列时保留系列颜色？

// 添加系列
var series1 = new Series("Series 1");
series1.Color = Color.Red;
chartControl.Series.Add(series1);

var series2 = new Series("Series 2");
series2.Color = Color.Blue;
chartControl.Series.Add(series2);

// 删除系列
var seriesToDelete = chartControl.Series[0];
var seriesColor = seriesToDelete.Color;
chartControl.Series.Remove(seriesToDelete);

// 重新添加系列
var newSeries = new Series("Series 1");
newSeries.Color = seriesColor;
chartControl.Series.Add(newSeries);