void Expoly()
{
Pen pen = new Pen();
pen.SetColor("red");
WhiteBoardPen whiteBoardPen = new WhiteBoardPen();
whiteBoardPen.SetColor("red");
whiteBoardPen.ImAWhiteBordPen();
Pen wbPen = whiteBoardPen;
//will not work - wbPen.ImAWhiteBordPen
wbPen.WriteToScreen("Poly? yes but can only call on Pen members");
}
//----- exampel code methods ------------------------------
void ExInheritance()
{
Pen pen = new Pen();
pen.WriteToScreen("Hello World!");
pen.SetColor("red");
pen.WriteToScreen("Hello World!");
WhiteBoardPen whiteBoardPen = new WhiteBoardPen();
whiteBoardPen.WriteToScreen("Im a whitebord pen");
whiteBoardPen.SetColor("red");
whiteBoardPen.WriteToScreen("Im a red whitebord pen");
}