[NEW] Add PointPairBase [FIX] Make ColorValue property virtual/override in PointPair/StockPt
[NEW] Add PointPairBase
[FIX] Make ColorValue property virtual/override in PointPair/StockPt


ZedGraph/ZedGraph,faint32/ZedGraph,DHMechatronicAG/ZedGraph,discomurray/ZedGraph