Random String Generator With Timestamp

using System;
using System.Text;

public class Program
{
    public static void Main()
    {
        string title = GenerateRandomString(5);
        string description = GenerateRandomString(10);

        Console.WriteLine("Title: " + title);
        Console.WriteLine("Description: " + description);

        static string GenerateRandomString(int length)
        {
            string characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
            Random random = new Random();

            StringBuilder sb = new StringBuilder(length);

            for (int i = 0; i < length; i++)
            {
                char c = characters[random.Next(characters.Length)];
                sb.Append(c);
            }

            //string timestamp = DateTime.Now.AddHours(3).ToString("yyyyMMddHHmmss");
            //string timestamp = DateTime.Now.AddHours(3).ToString(@"dd/MM/yy HH:mm:ss");
            string timestamp = DateTime.Now.AddHours(3).ToString(@"dd.MM.yy HH:mm:ss");

            return sb.ToString() + " " + timestamp;
        }
    }
}