Having trouble with public strings

public static class Password {

    public static void Main() {

        Console.WriteLine("Please enter your new password");

        string password = Console.ReadLine(); //I want to make this one public and then use it in the other class..
        Console.WriteLine("Are you sure you want to change your password to: " + password + "? (Yes/No)");
        string input = Console.ReadLine();

        if(input.ToLower() == "yes")
        {
            Console.WriteLine("Your password has been changed to " + password + "!");
            Console.WriteLine("Press any key to continue..");
            Console.ReadKey();
            Console.Clear();
            Username.Name ();

        }
        else if(input.ToLower() == "no")
        {
        Console.WriteLine(password + " will not be saved as your password");
        Console.WriteLine("Press any key to restart");
        Console.ReadKey();
        Console.Clear();
        Main();
        //System.Environment.Exit(0);

        }

        else
        {
        Console.WriteLine("ERROR! Press any key to restart");
        Console.ReadKey();
        Console.Clear();
        Main ();
        }
    }




}
public static class Username
{
    public static void Name ()
    {                               //And that is here.
    Console.WriteLine("Please enter a username you would like");
    Console.ReadLine();
    }



}