using System;

public class Button

{

    public delegate void Notify();

    public event Notify OnButtonClicked;

​

     public void RemoveAllListener()

    {

        OnButtonClicked = null;

    }

​

    public void SimulateButtonClick()

    {

        Console.WriteLine("[Button]: Button Clicked");

        if (OnButtonClicked != null)

        {

            OnButtonClicked();

        }

    }

​

}

​

public class Form

{

    public void Submit()

    {

        Console.WriteLine("[Form]: Submit form data");

    }

}

​

public class AudioManager

{

    public static void PlayClickSFX()

    {

        Console.WriteLine("[AudioManager]: Play click SFX");

    }

    public class LoadingBar : EventHandlerBase

{

    public event Notify OnLoadingCompleted;

    public void SimulateLoadingComplete()

    {

        // Write statement here

    }

}

}

​

​

public class Program

{

    public static void Main(string[] args)

    {

    {

        Button submitButton = new Button();

        Form userRegistrationForm = new Form();

        LoadingBar loadingBar = new LoadingBar();

​

        submitButton.OnButtonClicked += userRegistrationForm.Submit;

        submitButton.OnButtonClicked += AudioManager.PlayClickSFX;

        loadingBar.OnLoadingCompleted += SceneManager.LoadScene;

​

        submitButton.SimulateButtonClick();

        loadingBar.SimulateLoadingComplete();

        };

​

    }

}

public class EventHandlerBase

{

    public delegate void Notify();

}

​

public class Button : EventHandlerBase

{

}

public class LoadingBar : EventHandlerBase

{

    public event Notify OnLoadingCompleted;

    public void SimulateLoadingComplete()

    {

        // Write statement here

    }

}