public void On(Sell order)
{
//do sell
Thread.Sleep(250);
Console.WriteLine("Position {0} sold for {1}", order.PositionId, order.SellingPrice);
}
protected bool Equals(Sell other)
{
return(Equals(_destinationId, other._destinationId) && _positionId.Equals(other._positionId) && _sellingPrice == other._sellingPrice);
}