System.Web.UI.WebControls.Menu.OnPreRender C# (CSharp) Method

		protected internal override void OnPreRender (EventArgs e)
		{
			base.OnPreRender (e);

			string cmenu = ClientID + "_data";
			StringBuilder script = new StringBuilder ();
			Page page = Page;
			HtmlHead header;
			ClientScriptManager csm;

			if (page != null) {
				header = page.Header;
				csm = page.ClientScript;
			} else {
				header = null;
				csm = null;
			}
			
			Renderer.PreRender (page, header, csm, cmenu, script);

			if (csm != null) {
				csm.RegisterWebFormClientScript ();
				csm.RegisterStartupScript (typeof(Menu), ClientID, script.ToString (), true);
			}
		}