public ElementExtensions_CopyTo() { var htmlDocument = new HtmlParser().Parse(string.Empty); this.source = htmlDocument.CreateElement("source"); this.source.SetAttribute("dummy1", string.Empty); this.source.SetAttribute("dummy2", string.Empty); this.source.SetAttribute("dummy3", string.Empty); this.source.SetAttribute("dummy4", string.Empty); var childElement = htmlDocument.CreateElement("childElement"); childElement.SetAttribute("id", "elementId"); childElement.InnerHtml = "<p>text</p>"; this.source.AppendChild(childElement); this.destination = htmlDocument.CreateElement("target"); }