Persist the Visual Tree when switching tabs in the WPF TabControl (Optimized)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using System.Linq.Expressions;
using System.ComponentModel;

namespace NonVirtualizingTabControlDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        public MainWindow()
        {
            InitializeComponent();
            Items = new ObservableCollection<ColorInfo>();
            DataContext = this;
        }

        #region Fields

        private ColorInfo _current;

        #endregion

        #region Properties

        public ColorInfo SelectedColor
        {
            get { return _current; }
            set
            {
                _current = value;
                if (!(Items as ObservableCollection<ColorInfo>).Contains(value))
                    (Items as ObservableCollection<ColorInfo>).Add(value);

                PropertyChanged(this, new PropertyChangedEventArgs("SelectedColor"));
            }
        }

        public IEnumerable<ColorInfo> Items { get; private set; }

        #endregion

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged = delegate { };

        #endregion
    }
}