private string title;
        /// <summary>
        /// 标题
        /// </summary>
        public string Title
        {
            get { return title; }
            set
            {
                title = value;
                this.RaisePropertyChanged("Title");
            }
        }

using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;
using System.Linq;

namespace WpfApp1
{
    public partial class MainWindow
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        Label _label = new Label {Content = "dynamic label"};
        TextBox _text = new TextBox {Text = "dynamic text", Margin = new Thickness(150, 0, 0, 0 ) };
        public UIElementCollection CanvasChildren
        {
            get { return new UIElementCollection(this, null) { _label, _text }; }
        }
    }

    public class BindChildren : Behavior<Panel>
    {
        private static readonly DependencyProperty ChildrenProperty = DependencyProperty.Register("Children", typeof (UIElementCollection), typeof (BindChildren));

        public UIElementCollection Children
        {
            get { return (UIElementCollection)GetValue(ChildrenProperty);  }
            set { SetValue(ChildrenProperty, value); }
        }

        protected override void OnAttached()
        {
            if (Children != null)
            {
                var children = Children.Cast<UIElement>().ToList();
                Children.Clear(); // remove all children from original container in order to add it to new container
                children.ForEach(child => this.AssociatedObject.Children.Add(child));
            }
        }
    }
}