public static IEnumerable <LinkedListNode <T> > GetRangeNodes <T>(this LinkedListNode <T> start, int offset)
{
if (offset == 0)
{
return(new[] { start });
}
List <LinkedListNode <T> > buffer = new List <LinkedListNode <T> >();
int step = offset < 0 ? -1 : 1;
for (int i = 0; offset <0 ? i> offset : i < offset; i += step)
{
buffer.Add(start.GetAtOffset(i));
}
return(offset < 0 ? buffer.AsEnumerable().Reverse() : buffer);
}