...
chtCurrent.PrePaint += new EventHandler<ChartPaintEventArgs>(chtCurrent_PrePaint);
...
void chtCurrent_PrePaint(object sender, ChartPaintEventArgs e) 
{ 
    Axis axis = chtCurrent.ChartAreas[0].AxisY; 
    double max = axis.Maximum; 
    double min = axis.Minimum; 
}

------解决方案--------------------
  //X 轴坐标最大最小值  

  chartCWPBestMode.ChartAreas["ChartAreaCWP"].AxisX.Minimum = 0;  

  chartCWPBestMode.ChartAreas["ChartAreaCWP"].AxisX.Maximum = 100;

------解决方案--------------------
探讨

其实我现在也有这个问题，当同时设置最大值和最小值的时候会抛出异常-Axis Object - Auto Interval doesn’t have proper value.
等待答案！