using System;

public class Program

{

    public static void Main()

    {

        var service = new FoodOrderingService();

        service.FoodPrepared = new FoodPreparedEventHandler((_, ___) => {});

        service.FoodPreparedEventHandler = new FoodPreparedEventHandler((_, ___) => {});

        service.FoodPrepared(null, null);

        service.FoodPreparedEvent(null, null);

    }

}

​

public delegate void FoodPreparedEventHandler(object source, EventArgs args);

public class FoodOrderingService: IFoodOrderingService 

{

   public event FoodPreparedEventHandler FoodPreparedEvent;

   public FoodPreparedEventHandler FoodPrepared;

}

​

public interface IFoodOrderingService

{

   event FoodPreparedEventHandler FoodPreparedEvent;

   FoodPreparedEventHandler FoodPrepared;

}