How to evaluate javascript in Xamarin.Android/Monodroid and retrieve result?

Question

For Xamarin.iOS/Monotouch it is simple to retrieve a string when evaluating javascript.

e.g.

string elementValue = browser.EvaluateJavascript("document.getElementById('Id').value");

if(elementValue != "")
{
   DoSomething();
}

Could anybody provide an example of how to do this for Xamarin. Android/Monodroid using loadURL(javascript:)?