using System;

using System.IO;

public class Program

{

    public static void Main()

    {

        string username;

        string password;

        string filename = "userdata.txt";

        Console.WriteLine("pleae enter your username"); // asking for a username and inputting it

        username = Console.ReadLine();

        Console.WriteLine("please enter your password"); // asking for a password and inputting it

        password = Console.ReadLine();

        File.WriteAllText(filename, (username + password));

    }

}