Excluding Specific Blocks

 if (b == 4)
                    {
                        con.Send(worldkey, l, x, y, blocks[l, x, y]); Thread.Sleep(25);
}
else
{
                        blocks[l, x, y] = b;
                        #region Deleting/Adding Map Data
                        if (b == 0)
                        {
                            List<block> temp = new List<block>();
                            temp.AddRange(blockL);
                            foreach (block bid in temp)
                            {
                                if (bid.x == x && bid.y == y && bid.layer == l)
                                {
                                    blockL.Remove(bid);
                                    break;
                                }
                            }
                        }
                        else
                        {
                                blockL.Add(new block { layer = l, x = x, y = y, bid = b });
                        }
                        #endregion
                    }