App.Current.Host.Content.FullScreenOptions = 

    System.Windows.Interop.FullScreenOptions.StaysFullScreenWhenUnfocused;

App.Current.Host.Content.IsFullScreen = 

    !App.Current.Host.Content.IsFullScreen;

App.Current.Host.Content.IsFullScreen = !App.Current.Host.Content.IsFullScreen;

private void rectangle1_MouseWheel(object sender, 

        System.Windows.Input.MouseWheelEventArgs e)

{

    rectangle1.Width += e.Delta;

    rectangle1.Height += e.Delta;

}

<Image x:Name="mühmat" Source="fotolar/11.JPG" Height="204" 

       VerticalAlignment="Top" HorizontalAlignment="Left" Width="356" 

       d:LayoutOverrides="HorizontalAlignment" Stretch="None" 

       Margin="-62,117,0,0"/>

mühmat.Stretch = Stretch.Uniform;

<TextBlock x:Name="textbox_wrap" Width="248" TextWrapping="Wrap"

  Height="52" Text="Microsoft Teknolojileri ile 365 günde 365 püf nokta" />

textbox_wrap.TextWrapping = TextWrapping.Wrap;

<TextBlock x:Name="textbox_wrap" Width="248" TextWrapping="NoWrap"

  Height="52" Text="Microsoft Teknolojileri ile 365 günde 365 püf nokta" />

textbox_wrap.TextWrapping = TextWrapping.NoWrap;