There is a short cut way to convert ArrayList to a generic list instead of looping through items.
Generally this is what people do
List orders = new List(myArrayList.count);
foreach (WarriorTrading.Order order in myArrayList)
But this can be done in single line by this
(myArrayList.ToArray() as WarriorTrading.Order).ToList();
Very simple! Isn't it?