private static bool Less(this byFileName p, long i, long j)
{
return(p[i].FileName < p[j].FileName);
}
private static void Swap(this byFileName p, long i, long j)
{
p[i] = p[j];
p[j] = p[i];
}
private static long Len(this byFileName p)
{
return(len(p));
}
