List merge

        private void MergeListsOfCameras(ref List<Camera> list1, List<Camera> list2)
        {
            foreach (Camera c2 in list2)
            {
                for (int i = 0; i < list1.Count; i++)
                {
                    if (c2.Device == list1[i].Device)
                        break;
                    // We are at last element
                    if (i - 1 == list1.Capacity)
                        // Connected camera is not present in the list
                        list1.Add(c2);
                }
            }
        }