//EvalScript returns a JavaScript array
object obj = webView.EvalScript("document.getElementsByTagName('a');");

//Cast to strong typed Collection<Element>
var col = JSObject.CastTo<EO.WebBrowser.DOM.Collection<EO.WebBrowser.DOM.Element>>(obj);

//Look through all Element
int n = col.length;
for (int i = 0; i < n; i++)
{
    var item = col[i];
    System.Diagnostics.Debug.WriteLine(item.innerHTML);
}