我使用Dundas 的时候，想在一个图表里使用不同的参考量
比如产量（数值在5000-12000之间）和比例（数值在 15%-40%之间）
要是纵坐标的单位不分开的话，比例是看不出来的，我上网搜索了一下Dundas 竟然有这样的功能，可惜我不知道怎么使用，相关帮助文档也没有列出来，在这里请教一下The visual effect of overlaying lets you create unique chart types and other visual effects. The extent of what you can do with overlaying is pretty much left to your imagination. At Dundas Software, we have found other visual effects useful, including the overlaying of ChartArea elements to give multiple primary Y-axis scales or using pie charts as data points. 示例图片：
http://www.dundas.com/Products/Chart/NET/Why/WhitePapers/Images/MultiYAxis.png引用网址：
http://www.dundas.com/Products/Chart/NET/Why/WhitePapers/ChartAreas.aspx关键字：
multiple primary Y-axis scales
比如产量（数值在5000-12000之间）和比例（数值在 15%-40%之间）
要是纵坐标的单位不分开的话，比例是看不出来的，我上网搜索了一下Dundas 竟然有这样的功能，可惜我不知道怎么使用，相关帮助文档也没有列出来，在这里请教一下The visual effect of overlaying lets you create unique chart types and other visual effects. The extent of what you can do with overlaying is pretty much left to your imagination. At Dundas Software, we have found other visual effects useful, including the overlaying of ChartArea elements to give multiple primary Y-axis scales or using pie charts as data points. 示例图片：
http://www.dundas.com/Products/Chart/NET/Why/WhitePapers/Images/MultiYAxis.png引用网址：
http://www.dundas.com/Products/Chart/NET/Why/WhitePapers/ChartAreas.aspx关键字：
multiple primary Y-axis scales
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