C# winform 画chart时，出现红叉，异常log如下，如何解决

运行一段时间后，会出现，概率很低。
如下异常log什么原因。
************** 异常文本 **************
System.InvalidOperationException: 集合已修改；可能无法执行枚举操作。
   在 System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   在 System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   在 System.Collections.Generic.List`1.Enumerator.MoveNext()
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.GetPointsInterval(List`1 seriesList, Boolean isLogarithmic, Double logarithmicBase, Boolean checkSameInterval, Boolean& sameInterval, Series& series)
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.SetDefaultFromData(Axis axis)
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.SetDefaultFromIndexesOrData(Axis axis, AxisType axisType)
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.SetDefaultAxesValues()
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.SetData(Boolean initializeAxes, Boolean checkIndexedAligned)
   在 System.Windows.Forms.DataVisualization.Charting.ChartArea.ReCalcInternal()
   在 System.Windows.Forms.DataVisualization.Charting.ChartPicture.Paint(Graphics graph, Boolean paintTopLevelElementOnly)
   在 System.Windows.Forms.DataVisualization.Charting.Chart.OnPaint(PaintEventArgs e)
   在 System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   在 System.Windows.Forms.Control.WmPaint(Message& m)
   在 System.Windows.Forms.Control.WndProc(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   在 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)