public void addOrder(Order x)
        {
            bool available = true;

            if (x.orderID > 0)
            {
                foreach (Order item in orderList)
                {
                    if (item.orderID == x.orderID) // search through if key exists in list.
                    {
                        available = false;
                    }
                }
            }
            if (x.orderID == 0)
            {
                do
                {
                    available = true;
                    x.randOrderNum(); // func in Branch.cs that gives a new random orderNum -> [1,10000]
                    foreach (Order item in orderList)
                    {
                        if (item.orderID == x.orderID)
                        {
                            available = false;
                        }
                    }
                } while (!available); // The fact that the number exists in the list doesn't mean we arent going to add it, just give it a new random numer
            }
            //Have to check that the order's hechser fits the branch:
            if ((int)x.orderHechserOrder < (int)getBranch(x.orderBranch).branchHechserBranch)
            {
                throw new Exception("The Order's Hechser isn't high enough for the Branch");
            }
            if (available) // add to the list.
            {
                orderList.Add(x);
            }
            else
            {
                throw new Exception("orderID already exists for a different order.");
            }
        }