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        /// <summary>

        /// Row 개체가 생성되면 발생합니다.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void table_LoadingRow(object sender, DataGridRowEventArgs e)

        {

            e.Row.Header = (e.Row.GetIndex()+1).ToString();

        } 

            for (int i = 0; i < this.table.Items.Count; i++)

            {

                var obj = this.table.ItemContainerGenerator.ContainerFromIndex(i);

                if (Validation.GetHasError(obj) == true)

                {

                    MessageBox.Show(string.Format("테이블 {0}번째 데이터가 잘못 입력되었습니다.",i.ToString()), "에러", MessageBoxButton.OK, MessageBoxImage.Error);

                    return;

                }

            } 

<NavigationWindow x:Class="ARCROM.GIFMaker.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="300" Width="300" Source="MainPage.xaml" WindowState="Maximized">

</NavigationWindow> 

        //

        // 요약:

        //     System.Windows.Controls.Page 인스턴스가 탐색 기록에 유지되는지 여부를 나타내는 값을 가져오거나 설정합니다.

        //

        // 반환 값:

        //     System.Windows.Controls.Page 인스턴스가 탐색 기록에 유지되면 true이고, 그렇지 않으면 false입니다.기본값은

        //     false입니다.

        public bool KeepAlive { get; set; }

xmlns:gl="clr-namespace:ARCROM.GIFMaker.BusinessLogic;assembly=ARCROM.GIFMaker.BusinessLogic" 

<TextBox Text="{Binding Source={x:Static gl:Global.Singleton},Path=GeometryInfo.River,Mode=OneTime}"/> 

    public class Global

    {

        #region Singleton

        public static Global Singleton{get;private set;}

        static Global()

        { Singleton = new Global(); }

        private Global()

        { }

        #endregion

              ........................ 

 WebBrowser 컨트롤이 Focus를 잃었다가 다시 얻으면 Wheel Event가 발생되지 않는 문제였습니다.

<Window.Resources>

        <Storyboard x:Key="sbBlinking">

            <!--타겟을 버튼으로두고, 타겟속성을 Opacity로 Opacity값을 1에서 0.3으로 줄였다가

             AutoReverse가 True이므로 다시 0.3에서 1로 증가를 RepeatBehavior가 Forever이므로 무한정 반복-->

            <DoubleAnimation Storyboard.TargetName="btnStartOrEnd"

                             Storyboard.TargetProperty="Opacity"

                             From="1" To="0.3" Duration="0:0:1" RepeatBehavior="Forever"

                             AutoReverse="True">

            </DoubleAnimation>

        </Storyboard>

    </Window.Resources>

    <Canvas>

        <Label Name="lblState" Canvas.Left="54" Canvas.Top="10">Waiting</Label>

        <Button Click="btnStartOrEnd_Click"  Name="btnStartOrEnd" Content="Start" Height="23" Width="75" Margin="282,135,130,141" Canvas.Left="-127" Canvas.Top="-122" />

    </Canvas>

</Window> 

 /// <summary>

    /// MainWindow.xaml에 대한 상호 작용 논리

    /// </summary>

    public partial class MainWindow : Window

    {

        const string TXT_START = "Start";

        const string TXT_DISCONNECT = "Disconnect";

        const string TXT_CONNECTING = "Connecting..";

        const string TXT_CONNECTED = "Connected!";

        const string TXT_WAITING = "Waiting..";

        public MainWindow()

        {

            InitializeComponent();

            this.Loaded += new RoutedEventHandler(MainWindow_Loaded);

        }

        void MainWindow_Loaded(object sender, RoutedEventArgs e)

        {

            this.btnStartOrEnd.Content = TXT_START;

        }

        private void btnStartOrEnd_Click(object sender, RoutedEventArgs e)

        {

            if (this.btnStartOrEnd.Content.Equals(TXT_START))

            {

                //Start

                this.TryConnect();

            }

            else if (this.btnStartOrEnd.Content.Equals(TXT_DISCONNECT))

            {

                //Disconnect

                this.UpdateUIContent(TXT_START, TXT_WAITING);

            }

        }

        /// <summary>

        /// 연결을 시도합니다.

        /// </summary>

        private void TryConnect()

        {

            //버튼과 레이블의 Content를 변경하고

            this.UpdateUIContent(TXT_WAITING, TXT_CONNECTING);

            this.btnStartOrEnd.IsEnabled = false;

            //스토리보드 시작을 하고

            Storyboard sb = this.Resources["sbBlinking"] as Storyboard;

            //sb.Begin(this.btnStartOrEnd); //Xaml에서 지정하지 않을 경우 cs에서 직접 지정

            sb.Begin();

            //연결이 3초 후 성공하였다고 가정한다.

            System.Windows.Threading.DispatcherTimer timer = new System.Windows.Threading.DispatcherTimer(new TimeSpan(0, 0, 3),

                  System.Windows.Threading.DispatcherPriority.SystemIdle, this.ConnectSuccess, this.Dispatcher);

        }

        /// <summary>

        /// 연결에 성공하였습니다.

        /// </summary>

        /// <param name="state"></param>

        //public void ConnectSuccess(object state)

        public void ConnectSuccess(object sender, EventArgs e)

        {

            System.Windows.Threading.DispatcherTimer timer = sender as System.Windows.Threading.DispatcherTimer;

            timer.Stop();

            this.UpdateUIContent(TXT_DISCONNECT, TXT_CONNECTED);

            Storyboard sb = this.Resources["sbBlinking"] as Storyboard;

            sb.Stop();

            this.btnStartOrEnd.IsEnabled = true;

        }

        /// <summary>

        /// 상태 UI를 갱신합니다.

        /// </summary>

        /// <param name="btnContent"></param>

        /// <param name="lblContent"></param>

        private void UpdateUIContent(string btnContent, string lblContent)

        {

            this.btnStartOrEnd.Content = btnContent;

            this.lblState.Content = lblContent;

        }

    }