public ReadOnlySubList(ReadOnlySubList <T> superList, int first, int count)
{
// Point directly to original list.
this.superList = superList.superList;
startIdx = superList.startIdx + first;
endIdx = superList.startIdx + first + count;
}
public ReadOnlySubList(ReadOnlySubList <T> superList)
: this(superList, 0, superList.Count)
{
}