using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        List<string> x = new List<string>

        { "001", "002", "003", "004", "005",

          "006", "007", "008", "009", "010",

          "011", "012", "013", "014", "015",

          "016", "017", "018", "019", "020" };

        /*

         *                                                                  Begin in the label #5

         * 001      006     011         =>  001     002     003         =>  ---     ---     ---

         * 002      007     012         =>  004     005     006         =>  ---     001     002

         * 003      008     013         =>  007     008     009         =>  003     004     005

         * 004      009     014         =>  010     011     012         =>  006     007     008

         * 005      010     015         =>  013     014     015         =>  009     010     011 ...

         * ----------------------------------------------------------------------------------------

         * 016                          =>  016     017     018

         * 017                          =>  019     020

         * 018                          =>  ---     ---

         * 019                          =>  ---     ---

         * 020                          =>  ---     ---

        */

        List<string> final = new List<string>();

        int firstPosition = 1;

        int rows = 4;

        int columns = 4;

        for (int i = 0; i < (firstPosition - 1); i++)

        {

            x.Insert(0, "---");

        }

        int labels = rows * columns;

        int pages = x.Count() / labels + ((x.Count() % labels) == 0 ? 0 : 1);

        Console.WriteLine("Total labels {0}", x.Count());

        Console.WriteLine("Total labels per page {0}", labels);

        Console.WriteLine("Total pages {0}", pages);

        Console.WriteLine();

        for (int page = 0; page < pages; page++)

        {

            for (int i = 0; i < columns; i++)

            {

                int r = rows;

                var h = x.Skip(page * labels).Where((c, index) => index % columns == i).Take(rows).ToList();

                foreach (var s in h)

                {

                    final.Add(s);

                    r--;

                }

                for (int j = 0; j < r; j++)

                {

                    final.Add("---");

                }

            }

        }

        for (int page = 0; page < pages; page++)

        {

            Console.WriteLine("Page={0}", (page + 1));

            for (int row = 0; row < rows; row++)

            {

                string s = "";

                for (int column = 0; column < columns; column++)

                {

                    int position = (page * labels) + (column * rows) + row;

                    if (position < final.Count())

                    {

                        s += ((column == 0) ? "" : "\t") + final[position];

                    }

                }

                Console.WriteLine(s);

            }

        }

    }

}