public override int GetLineNumberFromPosition(int position)
{
if ((position < 0) || (position > this.Length))
{
throw new ArgumentOutOfRangeException("position");
}
return((position <= _left.Length)
? _left.GetLineNumberFromPosition(position)
: (_left.LineBreakCount +
_right.GetLineNumberFromPosition(position - _left.Length)));
}
