using System;

​

namespace ConsoleApp

{

    public static class RandomPrint

    {

        public static string ToRandomPrint(this Object obj)

        {

            Random random = new Random();

            return (string)obj + random.Next(0, 99999).ToString();

        }

        public static string ToRandomPrint(this Object obj, string appendstring)

        {

            return (string)obj + appendstring;

        }

    }

    public class Program

    {

        public static void Main()

        {

            var randostring = "HelloWorld".ToRandomPrint();

            var randotext = "HelloWorld".ToRandomPrint("randomText");

            Console.WriteLine(randostring);

            Console.WriteLine(randotext);

        }

    }

}

​