public Tree(SolvingLayer Layer)
 {
     layer = Layer;
     InitializeComponent();
 }
 public PageEvents(SolvingLayer Layer)
 {
     InitializeComponent();
     layer = Layer;
     Init();
 }
 public PageActions(SolvingLayer Layer)
 {
     InitializeComponent();
     layer = Layer;
 }
 public PageActions()
 {
     InitializeComponent();
     layer = new SolvingLayer();
 }
 public PageEvents(SolvingLayer Layer)
 {
     InitializeComponent();
     layer = Layer;
     Init();
 }
 public PageActions(SolvingLayer Layer)
 {
     InitializeComponent();
     layer = Layer;
 }
        private NavigationService navigation; // которые могут использоваться любой страницей

        #endregion Fields

        #region Constructors

        public PageActions()
        {
            InitializeComponent();
            layer = new SolvingLayer();
        }