Add one space after every two characters and add a character infront of every single character

Question

I want to add one space after every two characters, and add a character in front of every single character.

This is my code:

string str2;
str2 = str1         


        

Answer 1

I think this is what you asked for

string str1 = "3322356";
            string str2;

            str2 = String.Join(" ", 
                str1.ToCharArray().Aggregate("",
                (result, c) => result += ((!string.IsNullOrEmpty(result) &&
                    (result.Length + 1) % 3 == 0) ? " " : "") + c.ToString())
                    .Split(' ').ToList().Select(
                x => x.Length == 1 
                    ? String.Format("{0}{1}", Int32.Parse(x) - 1, x) 
                    : x).ToArray());

result is "33 22 35 56"