Numerical string to fancy graphical output, C#

Language: Layout:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

using LargeCharacters;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Number.Convert("0123456789");
        }
    }
}

namespace LargeCharacters
{
    public class Number
    {
        public static void Convert(string input)
        {
            foreach(string s in Number.ToLarge(input))
            {
                Console.WriteLine(s);
            }
        }
        
        public static string[] ToLarge(string input)
        {
            char[] c = input.ToCharArray();
            string[] lines = new string[7];
            int counter = 0;
            
            foreach(char ch in c)
            {
                switch(ch)
                {
                    case '0':
                        counter = 0;
                        foreach(string s in Numbers.zero())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '1':
                        counter = 0;
                        foreach(string s in Numbers.one())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '2':
                        counter = 0;
                        foreach(string s in Numbers.two())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '3':
                        counter = 0;
                        foreach(string s in Numbers.three())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '4':
                        counter = 0;
                        foreach(string s in Numbers.four())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '5':
                        counter = 0;
                        foreach(string s in Numbers.five())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '6':
                        counter = 0;
                        foreach(string s in Numbers.six())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '7':
                        counter = 0;
                        foreach(string s in Numbers.seven())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '8':
                        counter = 0;
                        foreach(string s in Numbers.eight())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                    case '9':
                        counter = 0;
                        foreach(string s in Numbers.nine())
                        {
                            lines[counter] += s;
                            counter++;
                        }
                        break;
                }
            }
            
            return lines;
        }
    }
    
    public static class Numbers
    {
        public static string[] zero()
        {
            string[] lines = new string[7];
            
            lines[0] = "   0000   ";
            lines[1] = " 000  000 ";
            lines[2] = " 000  000 ";
            lines[3] = " 000  000 ";
            lines[4] = " 000  000 ";
            lines[5] = " 000  000 ";
            lines[6] = "   0000   ";
            
            return lines;
        }
        
        public static string[] one()
        {
            string[] lines = new string[7];
            
            lines[0] = "   11111 ";
            lines[1] = " 111 111 ";
            lines[2] = "     111 ";
            lines[3] = "     111 ";
            lines[4] = "     111 ";
            lines[5] = "     111 ";
            lines[6] = "     111 ";
            
            return lines;
        }
        
        public static string[] two()
        {
            string[] lines = new string[7];
            
            lines[0] = "   22222   ";
            lines[1] = " 222   222 ";
            lines[2] = "      222  ";
            lines[3] = "     222   ";
            lines[4] = "    222    ";
            lines[5] = "   222     ";
            lines[6] = " 222222222 ";
            
            return lines;
        }
        
        public static string[] three()
        {
            string[] lines = new string[7];
            
            lines[0] = "   33333   ";
            lines[1] = " 333   333 ";
            lines[2] = "       333 ";
            lines[3] = "     333   ";
            lines[4] = "       333 ";
            lines[5] = " 333   333 ";
            lines[6] = "   33333   ";
            
            return lines;
        }
        
        public static string[] four()
        {
            string[] lines = new string[7];
            
            lines[0] = " 444   444 ";
            lines[1] = " 444   444 ";
            lines[2] = " 444   444 ";
            lines[3] = " 444444444 ";
            lines[4] = "       444 ";
            lines[5] = "       444 ";
            lines[6] = "       444 ";
            
            return lines;
        }
        
        public static string[] five()
        {
            string[] lines = new string[7];
            
            lines[0] = " 555555555 ";
            lines[1] = " 555555555 ";
            lines[2] = " 555       ";
            lines[3] = " 55555555  ";
            lines[4] = "       555 ";
            lines[5] = " 555555555 ";
            lines[6] = " 55555555  ";
            
            return lines;
        }
        
        public static string[] six()
        {
            string[] lines = new string[7];
            
            lines[0] = "    666666  ";
            lines[1] = "  666666    ";
            lines[2] = " 666        ";
            lines[3] = " 666666666  ";
            lines[4] = " 666    666 ";
            lines[5] = " 666666666  ";
            lines[6] = "   666666   ";
            
            return lines;
        }
        
        public static string[] seven()
        {
            string[] lines = new string[7];
            
            lines[0] = " 7777777777 ";
            lines[1] = " 7777777777 ";
            lines[2] = "       777  ";
            lines[3] = "      777   ";
            lines[4] = "     777    ";
            lines[5] = "    777     ";
            lines[6] = "   777      ";
            
            return lines;
        }
        
        public static string[] eight()
        {
            string[] lines = new string[7];
            
            lines[0] = "    8888    ";
            lines[1] = "  88    88  ";
            lines[2] = " 888    888 ";
            lines[3] = "  88888888  ";
            lines[4] = " 888    888 ";
            lines[5] = "  88    88  ";
            lines[6] = "   888888   ";
            
            return lines;
        }
        
        public static string[] nine()
        {
            string[] lines = new string[7];
            
            lines[0] = "    9999    ";
            lines[1] = "  999  999  ";
            lines[2] = " 999    999 ";
            lines[3] = "  999999999 ";
            lines[4] = "        999 ";
            lines[5] = "  999  999  ";
            lines[6] = "   999999   ";
            
            return lines;
        }
    }
}

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Compilation time: 0,12 sec, absolute running time: 0,11 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 3