public void EditTechnician(Technician tech, List <Service> newSkills, List <Service> oldSkills)
        {
            techCtr.Update(tech);

            foreach (Service i in genLogic.GetAddedItems(oldSkills, newSkills))
            {
                techCtr.Add(i, tech);
            }

            foreach (Service i in genLogic.GetRemovedItems(oldSkills, newSkills))
            {
                techCtr.Remove(i, tech);
            }
        }