public void UpdateAttachedReqs(AttachedRequirement item)
        {
            var oldItem = _reqs.FirstOrDefault(i => i.ID == item.ID);

            if (oldItem != null)
            {
                oldItem = item;
            }
        }
 public void DeleteAttachedReqs(AttachedRequirement item)
 {
     _reqs.Remove(item);
 }
 public void AddAttachedReqs(AttachedRequirement item)
 {
     item.ID = _reqs.Last().ID + 1;
     _reqs.Add(item);
 }