How to autohide all the docking window at a stretch in WPF DockingManager?

<Window x:Class="Application_New.MainWindow"
                 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                 xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
                 Title="MainWindow" Height="350" Width="525">
     <Grid x:Name="Grid1">
          <Grid.RowDefinitions>
               <RowDefinition Height="40"/>
               <RowDefinition Height="*"/>           
          </Grid.RowDefinitions>
          <Button x:Name="Button1" Grid.Row="0" Width="150" Height="30" Content="AutoHideAllDockWindow" Click="Button1_Click"/>
          <syncfusion:DockingManager x:Name="DockingManager1" Grid.Row="1">
              <ContentControl x:Name="Content1" syncfusion:DockingManager.Header="DockWindow1" syncfusion:DockingManager.State="Dock"/>
               <ContentControl x:Name="Content2" syncfusion:DockingManager.Header="DockWindow2" syncfusion:DockingManager.State="Dock"/>
               <ContentControl x:Name="Content3" syncfusion:DockingManager.Header="DockWindow3" syncfusion:DockingManager.State="Dock"/>
               <ContentControl x:Name="Content4" syncfusion:DockingManager.Header="DockWindow4" syncfusion:DockingManager.State="Dock"/>
               <ContentControl x:Name="Content5" syncfusion:DockingManager.Header="DockWindow5" syncfusion:DockingManager.State="Dock"/>
           </syncfusion:DockingManager>
      </Grid>
</Window>

using Syncfusion.Windows.Tools.Controls;
namespace Application_New
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();                 
        }
        private void Button1_Click(object sender, RoutedEventArgs e)
        {
          //  calling the AutoHideAllDockWindow method of the DockingManager
            DockingManager1.AutoHideAllDockWindow();
        }
    }
}