How to do Form Filling in WindowsForms using PdfViewerControl?

        /// <summary>
        /// Adds the Fields for particular page
        /// </summary>
        /// <param name="index">Index of the page</param>     
        public void AddFields(int index)
        {
            //FormFilesDictionary contans all the fields of particlar PDF page
            foreach (var currentField in FormFilesDictionary[index])
            {
                PdfPageBase page = ((PdfField)currentField).Page;
                //Adds a textbox if the current Field is Textbox
                if (currentField is PdfLoadedTextBoxField)
                {
                    PdfLoadedTextBoxField txtField = currentField as PdfLoadedTextBoxField;
                    TextBox txtBlock = new TextBox();                    
                    txtBlock.Text = txtField.Text;                  
                    // Textbox will get added to the Page
                    panel1.Controls.Add(txtBlock);
                }                               
            }
        }