<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"
        Title="DocumentContainer Demo" Height="600" Width="800">
    <Grid>
        <!-- DocumentContainer in TDI mode -->
        <syncfusion:DocumentContainer x:Name="documentContainer" Mode="TDI">
            <!-- Document 1 -->
            <FlowDocumentScrollViewer syncfusion:DocumentContainer.Header="Document 1">
                <FlowDocument>
                    <Paragraph>Content of Document 1</Paragraph>
                </FlowDocument>
            </FlowDocumentScrollViewer>
            
            <!-- Document 2 -->
            <FlowDocumentScrollViewer syncfusion:DocumentContainer.Header="Document 2">
                <FlowDocument>
                    <Paragraph>Content of Document 2</Paragraph>
                </FlowDocument>
            </FlowDocumentScrollViewer>
            
            <!-- Document 3 -->
            <FlowDocumentScrollViewer syncfusion:DocumentContainer.Header="Document 3">
                <FlowDocument>
                    <Paragraph>Content of Document 3</Paragraph>
                </FlowDocument>
            </FlowDocumentScrollViewer>
        </syncfusion:DocumentContainer>
    </Grid>
</Window>

using Syncfusion.Windows.Tools.Controls;
using System.Windows;
using System.Windows.Controls;

namespace DocumentContainerDemo
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            
            // Create DocumentContainer in MDI mode
            DocumentContainer documentContainer = new DocumentContainer();
            documentContainer.Mode = DocumentContainerMode.MDI;
            documentContainer.SwitchMode = SwitchMode.VS2005;
            
            // Add document windows
            Button doc1 = new Button { Content = "Document 1 Content" };
            Button doc2 = new Button { Content = "Document 2 Content" };
            Button doc3 = new Button { Content = "Document 3 Content" };
            
            // Set headers
            DocumentContainer.SetHeader(doc1, "Document 1");
            DocumentContainer.SetHeader(doc2, "Document 2");
            DocumentContainer.SetHeader(doc3, "Document 3");
            
            // Add to container
            documentContainer.Items.Add(doc1);
            documentContainer.Items.Add(doc2);
            documentContainer.Items.Add(doc3);
            
            // Set as window content
            this.Content = documentContainer;
        }
    }
}

<syncfusion:DocumentContainer Name="DocContainer" 
                              Mode="TDI" 
                              SwitchMode="QuickTabs">
    <!-- Add documents here -->
</syncfusion:DocumentContainer>

<syncfusion:DocumentContainer Name="DocContainer" 
                              Mode="MDI" 
                              CanMDIMinimize="True"
                              SwitchMode="VS2005">
    <!-- Add documents here -->
</syncfusion:DocumentContainer>

using System.Runtime.Serialization.Formatters.Binary;

// Save state to XML
BinaryFormatter formatter = new BinaryFormatter();
documentContainer.SaveDockState(formatter, StorageFormat.Xml, @"layout.xml");

// Load state from XML
BinaryFormatter formatter = new BinaryFormatter();
documentContainer.LoadDockState(formatter, StorageFormat.Xml, @"layout.xml");

// Add a new document
TextBox newDoc = new TextBox { Text = "New Document Content" };
DocumentContainer.SetHeader(newDoc, "New Document");
documentContainer.Items.Add(newDoc);

// Remove all documents
documentContainer.Items.Clear();

// Remove specific document
documentContainer.Items.Remove(newDoc);