System.Drawing.Color add all to list (C#)

I tried to get the example working and realised the list should be of type System.Drawing.Color or am I accessing it incorrectly.  

[code]

for(int i = 0; i < list.Count; i++){ // contains the number of series.

string str = "series" + i;
for(int j = 0; j < colours.Count; j++){

System.Windows.Forms.DataVisualization.Charting.series series str = new System.Windows.Forms.DataVisualization.Charting.series()
series.Color = // colours[i];??

}

}
[/code]

There's also a problem with syntax in these two lines, conflicting local variables.
string str = "series" + i;
System.Windows.Forms.DataVisualization.Charting.series series str = new .....