/// <summary>
/// Overrides the Render method for application of MEF plugins.
/// </summary>
/// <param name="writer">an HtmlTextWriter object</param>
protected override void Render(HtmlTextWriter writer)
{
var stringWriter = new StringWriter();
var htmlWriter = new HtmlTextWriter(stringWriter);
base.Render(htmlWriter);
var page = stringWriter.ToString();
// modify page based on available plugins
var business = new Plugins();
page = business.ComposeRenderPlugins(page);
writer.Write(page);
}