How to host PDFviewer WPF in windows forms application

// Declare the ElementHost variable
        ElementHost elementHost = null;
   // Wire up the Load event
            this.Load += new System.EventHandler(this.Form1_Load);
 
private void Form1_Load(object sender, System.EventArgs e)
        {
            // Create the ElementHost control
            elementHost = new ElementHost();
            elementHost.AutoSize = true;
            elementHost.Size = panel1.Size;
            elementHost.Dock = DockStyle.Fill;
            panel1.Controls.Add(elementHost);
 
            PdfViewer wordEditor = new PdfViewer();
            elementHost.Child = wordEditor;
 
            elementHost.Margin = new Padding(0, 0, 0, 0);
            elementHost.Region = new Region();
            elementHost.BackColor = System.Drawing.Color.White;
        }