for int workplaceArray Length i-- dic Add workplaceArray WorkplaceId w

for (int i = workplaceArray.Length - 1; i >= 0; i--)
            {
                dic.Add(workplaceArray[i].WorkplaceId, workplaceArray[i]);
            }
            for (int i = workplaceArray.Length - 1; i >= 1; i--)
            {
                dic[workplaceArray[i].ParentId]._childClientWorklaces.Add(workplaceArray[i]);
            }