using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var comments = "10:01:02 02/07/2023 - Spillman\r\nUserA comments\r\n10:01:04 02/07/2023 - Spillman\r\nTeste 123\r\n10:01:06 02/07/2023 - Spillman\r\nASDFG\r\n10:32:04 02/07/2023 - Spillman\r\nasdfsad f asdf as df asdf as dfa sdf asd fa sdf asd fa sdf asd fa sdf asdf asd\r\nfasdfasdf asdfasdf asdfasdfa sdf asdfa sdfa sdfa sdfa sfd asdf asd fa sdf asdf\r\nasdf asdf a sdf asdf   a sdf asdfasd fa sdfa sdf asdf af\\r\\n\r\n10:32:10 02/07/2023 - Spillman\r\nasdfas dfa sdf as df sd\r\n10:32:13 02/07/2023 - Spillman\r\nasdfasdfsadfasdfasfassfdf\r\n10:32:18 02/07/2023 - Spillman\r\nasdfasdfasdfasdfasdfasdf asdf a sdf asdf a sdf asd fa sdf asdf\r";

        var lines = comments.Split(new char[] { '\n' });

​

        var dataset = new List<Comments>();

        for (int i = 0; i < lines.Length; i += 2)

        {

            var comment = new Comments();

            comment.Comment  = lines[i];

            comment.UserName = lines[i + 1];                

            dataset.Add(comment);

        }

        foreach(var dt in dataset) 

        {

            Console.WriteLine("Header: " + dt.UserName + " - Comment: " + dt.Comment);

        }

    }

    internal class Comments

    {

        public string UserName { get; set; }

        public DateTime TimeStamp { get; set; }

        public string Comment { get; set; }

    }

}