gistfile1.cs

Section sect = new Section();

var stringElement = new Stringelement(etc etc);

var floatElement = new MVFloatElement(etc etc);
floatElement.OnValueChange += delegate(f) {
    stringElement.Value = string.Format("I just got {0:0.00}", f);
    //I think you need to do a reload of the tableview here, so it updates.
    //
// but you need the tableview, and the root has that...
//if (TableView != null)
//	TableView.ReloadData ();
};


sect.Add(floatElement);
sect.Add(stringElement);