Codecademy export

IDisplayable.cs

// Define IDisplayable in this file

using System;

namespace SavingInterface
{
  interface IDisplayable 
  {
    void Display();
  }
}

IResetable.cs

// Define IResetable in this file

using System;

namespace SavingInterface
{
  interface IResetable 
  {
    void Reset();
  }
}

PasswordManager.cs

using System;

namespace SavingInterface
{
  class PasswordManager: IDisplayable, IResetable
  {
    private string Password
    { get; set; }

    public bool Hidden
    { get; private set; }

    public PasswordManager(string password, bool hidden)
    {
      Password = password;
      Hidden = hidden;
    }

        public void Display()
    {
      Console.WriteLine("Password");
      Console.WriteLine("----------");
      Console.WriteLine(Hidden ? "***" : Password);
      Console.WriteLine(String.Empty);
    }

    public void Reset()
    {
      Password = String.Empty;
      Hidden = false;
    }
  }
}

Program.cs

using System;

namespace SavingInterface
{
  class Program
  {
    static void Main(string[] args)
    {
      TodoList tdl = new TodoList();
      tdl.Add("Invite friends");
      tdl.Add("Buy decorations");
      tdl.Add("Party");
      tdl.Display();
      tdl.Reset();
      tdl.Display();

      PasswordManager pm = new PasswordManager("iluvpie", true);
      pm.Display();
      pm.Reset();
      pm.Display();
    }
  }
}

TodoList.cs

using System;

namespace SavingInterface
{
  class TodoList: IDisplayable, IResetable
  {
    public string[] Todos
    { get; private set; }

    private int nextOpenIndex;

    public TodoList()
    {
      Todos = new string[5];
      nextOpenIndex = 0;
    }

    public void Add(string todo)
    {
      Todos[nextOpenIndex] = todo;
      nextOpenIndex++;
    }

    public void Display()
    {
      Console.WriteLine("Todos");
      Console.WriteLine("----------");
      foreach (string todo in Todos)
      {
        Console.WriteLine(todo != null  ? todo : "[Add a todo~]");
      }
      Console.WriteLine(String.Empty);
    }

    public void Reset() 
    {
      Todos = new string[5];
      nextOpenIndex = 0;
    }
  }
}