Hackertyper in C#

Program.cs

using System;

namespace hackertyper
{
    class MainClass
    {
        public static string text = "";
        public static string help = "hackertyper by sl4v\n" +
        	"\n-h        show help" +
        	"\n-v        show version" +
        	"\n-f [file] use file";
        public static void Main(string[] args)
        {
            if (args.Length >= 1)
            {
                switch (args[0])
                {
                    case "-h":
                        Console.WriteLine(help);
                        Environment.Exit(0);
                        break;
                    case "-v":
                        Console.WriteLine("I just made this lol. By sl4v");
                        Environment.Exit(0);
                        break;
                    case "-f":
                        text = System.IO.File.ReadAllText(args[1]);
                        break;
                }
            }
            else
            {
                Console.WriteLine("ELITE H4XING...");
                System.Net.WebClient client = new System.Net.WebClient();
                text = client.DownloadString("https://hackertyper.net/kernel.txt");
                Console.WriteLine("Starting H4X!");
                Console.Clear();
            }

            string text_until_now = "";
            Random random = new Random();
            for (int i = 0; text.Length > i; i++)
            {
                text_until_now += text[i];
                if (i % random.Next(2, 12) == 0)
                {
                    Console.ReadKey(true);
                    Console.Write(text_until_now);
                    text_until_now = "";
                }
            }
        }
    }
}