Split string with two characters C#

September 28, 2022

i need to split a string with 2 characters. There are 2 cases. For example "abcdef" = "{ab, cd, ef}". OR {abcde} = {"ab, cd, e_"}. If the last pair contains 1 symbol, add ‘_’. This is what i tried with first case

    public static string[] Split(string str)
    {
        var symbols  = str.ToCharArray();
        string[] result_arr = new string[str.Length];

        if(symbols.Length % 2 == 0)
        {
            for(int i = 0; i<symbols.Length-1; i += 2)
            {
                result_arr[i] = symbols[i].ToString() + symbols[i+1].ToString(); 
            }
        }
        
        return result_arr;
    }

The output is

ab

cd

ef

instead of

ab
cd
ef

>Solution :

using Enumerable.Range and LINQ

var input = "abcdef";
var result = Enumerable.Range(0, input.Length / 2).Select(x => input.Substring(x * 2, 2));
Console.WriteLine(string.Join(", ", result));