How to change MDI Window State in DocumentContainer?

//Code explains how to set MDIWindow State
<Window
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" x:Class="DocumentContainer.MainWindow"
Title="MainWindow" Height="350" Width="525">
<Grid>
<syncfusion:DocumentContainer Width="Auto" Height="Auto" Mode="MDI" >
<FlowDocumentScrollViewer Width="Auto" Height="Auto" syncfusion:DocumentContainer.Header="Features" syncfusion:DocumentContainer.MDIWindowState="Maximized" syncfusion:DocumentContainer.MDIBounds="0,0,300,300">
<FlowDocument>
 <Paragraph>A DocumentContainer is a control that is used for holdingthe documents, controls and panels inside it. Using a DocumentContainer you can create interfaces like MDI and TDI, which can make the end-user to create easily navigable applications. This help section will demonstrate all the important properties of the DocumentContainer that will help the end-user to know about all the available features.
</Paragraph></FlowDocument>
</FlowDocumentScrollViewer>
</syncfusion:DocumentContainer>
</Grid>
</Window>

//Code explains how to set MDI Window State in DocumentContainer
namespace DocumentContainer1
{
    public partial class MainWindow : Window
    {        
     public MainWindow()
     {
            InitializeComponent();
            DocumentContainer.SetMDIWindowState(Document,     MDIWindowState.Maximized);
        }
    }
}