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;
}