using System;

using System.Text;

public class Program

{

    public static void Main()

    {       

        DateTime centuryBegin = new DateTime(2001, 1, 1);

        DateTime currentDate = DateTime.Now;

​

        long elapsedTicks = currentDate.Ticks - centuryBegin.Ticks;

        Console.WriteLine((Guid.NewGuid().ToString("N") + elapsedTicks).ToString().Substring(0, 8));

        Console.WriteLine(GetRandomString(new Random(), 8));

    }

    public static string GetRandomString(Random rnd, int length)

        {

            string charPool = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvw xyz1234567890";

            StringBuilder rs = new StringBuilder();

​

            while (length > 0)

            {

                rs.Append(charPool[(int)(rnd.NextDouble() * charPool.Length)]);

                length--;

            }

            return rs.ToString();

        }

}