public class ExtendedUserControl :UserControl
    {
        public ExtendedUserControl()
        {
            this.Loaded += new RoutedEventHandler(ExtendedUserControl_Loaded);
        }

        /// 

        /// Event Delegate
        /// 
        /// 
        /// 
        public delegate void DataContextChangeHandler(object sender, DataContextChangedArgs e);
        public event DataContextChangeHandler DataContextChanged;


        /// 

        /// Raising Event
        /// 
        /// 
        void RaiseDataContextChanged(DataContextChangedArgs e)
        {
            if (DataContextChanged != null)
            {
                DataContextChanged(this, e);
            }
        }

        /// 

        /// Event Argument - Usually Object to support any type of data
        /// 
        public class DataContextChangedArgs
        {
            public object NewDataContext
            { get; set; }
        }

        /// 

        /// Dependency Property 
        /// 
        public object DTContextProperty
        {
            get { return (object)GetValue(DTContextPropertyProperty); }
            set { SetValue(DTContextPropertyProperty, value); }
        }
      
        public static readonly DependencyProperty DTContextPropertyProperty =
            DependencyProperty.Register("DTContextProperty",typeof(object),typeof(ExtendedUserControl),new PropertyMetadata(new PropertyChangedCallback(OnDTContextPropertyChanged)));

        /// 

        /// Dependency Property Call Back
        /// 
        /// 
        /// 
        static void OnDTContextPropertyChanged(object sender, DependencyPropertyChangedEventArgs args)
        {
            ExtendedUserControl source = (ExtendedUserControl)sender;
            object newValue = (object)args.NewValue;
            DataContextChangedArgs arg = new DataContextChangedArgs();
            arg.NewDataContext = newValue;
            source.RaiseDataContextChanged(arg);
        }
        
        /// 

        /// Setting Bindings to on loaded event of the user control
        /// 
        /// 
        /// 
        void ExtendedUserControl_Loaded(object sender, RoutedEventArgs e)
        {
            var binding = new System.Windows.Data.Binding();
            this.SetBinding(DTContextPropertyProperty, binding);
        }
    }