public static void EmbedHtmlEditingTool(HtmlEditingTool htmlEditingTool, Control parent)
        {
            if (htmlEditingTool.IsNull() ||
                parent.IsNull())
            {
                throw new ArgumentNullException();
            }

            htmlEditingTool.Dock = DockStyle.Fill;
            parent.Controls.Add(htmlEditingTool);
        }
        public static void EmbedHtmlSourceViewer(RichTextBox htmlSourceViewer, Control parent)
        {
            if (htmlSourceViewer.IsNull() ||
                parent.IsNull())
            {
                throw new ArgumentNullException();
            }

            htmlSourceViewer.Dock = DockStyle.Fill;
            htmlSourceViewer.BorderStyle = BorderStyle.None;
            htmlSourceViewer.ReadOnly = true;
            htmlSourceViewer.ScrollBars = RichTextBoxScrollBars.Both;
            parent.Controls.Add(htmlSourceViewer);
        }