private void Misc_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            var args = e as TECChangedEventArgs;

            if (e.PropertyName == "Type")
            {
                TECMisc old     = args.OldValue as TECMisc;
                TECMisc current = sender as TECMisc;
                if (old.Type == CostType.TEC)
                {
                    TECCostCollection.Remove(sender as TECMisc);
                }
                else if (old.Type == CostType.Electrical)
                {
                    ElectricalCostCollection.Remove(sender as TECMisc);
                }

                if (current.Type == CostType.TEC)
                {
                    TECCostCollection.Add(current);
                }
                else if (current.Type == CostType.Electrical)
                {
                    ElectricalCostCollection.Add(current);
                }
            }
        }
 private void handleAddMisc(TECMisc misc)
 {
     misc.PropertyChanged += Misc_PropertyChanged;
     if (misc.Type == CostType.TEC)
     {
         TECCostCollection.Add(misc);
     }
     else if (misc.Type == CostType.Electrical)
     {
         ElectricalCostCollection.Add(misc);
     }
 }