public KeyedList Remove(KeyedList other)
{
KeyedList copy = new KeyedList(keyedValues.Select(v => new KeyedVariable(v.Key, v.Value)).ToArray());
other.keyedValues.ForEach(v => copy.SetValue(v.GetValue(), null));
return(new KeyedList(copy.keyedValues.Where(k => k.Value != null).ToArray()));
}