public override QilNode this[int index] {
get {
if (index >= 0 && index < this.count)
return this.members[index];
throw new IndexOutOfRangeException();
}
set {
if (index >= 0 && index < this.count)
this.members[index] = value;
else
throw new IndexOutOfRangeException();
// Invalidate XmlType
this.xmlType = null;
}
}