C++ join characters logic

gistfile1.cs

  static char[][] join(string text, int size = 4) {
            return new char[][] { ("0" + text).ToJoinArray(size), ("1" + text).ToJoinArray(size), ("2" + text).ToJoinArray(size),
                ("3" + text).ToJoinArray(size), 
                ("4" + text).ToJoinArray(size), 
                ("5" + text).ToJoinArray(size), 
                ("6" + text).ToJoinArray(size), ("7" + text).ToJoinArray(size),
                ("8" + text).ToJoinArray(size), ("9" + text).ToJoinArray(size) };
        }

        static char[][] join2(string text, int size = 4) {
            return Enumerable.Range(0, 10).Select(x => join(x.ToString() + text, size)).SelectMany(x => x).ToArray();
        }

        static char[][] join3(string text, int size = 4) {
            return Enumerable.Range(0, 10).Select(x => join2(x.ToString() + text, size)).SelectMany(x => x).ToArray();
        }

        static char[][] join4(string text, int size = 8) {
            return Enumerable.Range(0, 10).Select(x => join3(x.ToString() + text, size)).SelectMany(x => x).ToArray();
        }
        
         static char[][] table1 = join("");
        static char[][] table2 = join2("");
        static char[][] table3 = join3("");
        static char[][] table4 = join4("");

gistfile2.cs

 static char[][] join(string text, int size = 4) {
            return new char[][] { (text + "0").ToJoinArray(size), (text + "1").ToJoinArray(size), (text + "2").ToJoinArray(size),
                (text + "3").ToJoinArray(size), 
                (text + "4").ToJoinArray(size), 
                (text + "5").ToJoinArray(size), 
                (text + "6").ToJoinArray(size), (text + "7").ToJoinArray(size),
                (text + "8").ToJoinArray(size), (text + "9").ToJoinArray(size) };
        }

        static char[][] join2(string text, int size = 4) {
            return Enumerable.Range(0, 10).Select(x => join(text + x.ToString(), size)).SelectMany(x => x).ToArray();
        }

        static char[][] join3(string text, int size = 4) {
            return Enumerable.Range(0, 10).Select(x => join2(text + x.ToString(), size)).SelectMany(x => x).ToArray();
        }

        static char[][] join4(string text, int size = 8) {
            return Enumerable.Range(0, 10).Select(x => join3(text + x.ToString(), size)).SelectMany(x => x).ToArray();
        }

https://code.google.com/p/stringencoders/wiki/NumToA