for (int i = 1; i < n; i++)
{
 	for (int d = 0; d < potok_count; d++)
    {
		potoki[d] = new Thread((object e) =>
        { .......... });
		potoki[d].start(d);
	}
	 for (int D = 0; D < potok_count; D++)
     {
         while (!is_end[D]) ;
         potoki[D].Abort();
     }
}