c# - How to reference chart ID that is stored in string? -

i passing string variable chartname contains id of chart trying reference. contents of string chart1, chart2, chart3. how can pull chart id out of string can use add data points chart?

the following code not work since chartname string variable , there no chart id named chartname:

chartname.series["series1"].points.add(series1data);     

my goal perform this:

"contents of chartname".series["series1"].points.add(series1data); 

which should like:

chart1.series["series1"].points.add(series1data); 

(this.findcontrol(chartname) chart).series used resolve this.

thank you, sergey litvinov!