public FloorsConnectionSection(Node first, Node last, Floor parent) : base("Связь этажей", parent)
        {
            this.First = first;
            this.Last  = last;
            First.AddSection(this);
            Last.AddSection(this);
            Width    = -1;
            Length   = 0;
            AutoSize = false;

            first.ParentFloor.PropertyChanged += NodePropertyChanged;
            last.ParentFloor.PropertyChanged  += NodePropertyChanged;
        }