In this case you could just use a sorted dictionary. The following page should give you a hint: https://www.dotnetperls.com/sorteddictionary

Hideyoshi 

In this case you could just use a sorted dictionary. The following page should give you a hint: https://www.dotnetperls.com/sorteddictionary

This looks promising!
Now to figure out how to implement.....

Hideyoshi 

In this case you could just use a sorted dictionary. The following page should give you a hint: https://www.dotnetperls.com/sorteddictionary

I think this will be the second step, because A changes on events,
So how would I assign a DataSeries add each time A changes?