Observer Pattern using Delegates V/s Observer Pattern using Events and Delegates

EvilSubscriber.cs

namespace DelegatesAndEvents
{
    class EvilSubscriber
    {
        WeatherStation weatherStation;

        public void EvilMessage(int temperature)
        {
            Console.WriteLine("The temperature is " + (temperature * 100));
        }

        public EvilSubscriber(WeatherStation weatherStation)
        {
            this.weatherStation = weatherStation;

            // Broadcast to all the subscriber
            weatherStation.Reporter(60);

            // Reassign the subscriber            
            weatherStation.Reporter = EvilMessage;

            // Replace all the subscribers            
            weatherStation.Reporter = null;
        }
    }
}

EvilSubscriber2.cs

class EvilSubscriber2
{
    WeatherStation2 weatherStation;

    public void EvilMessage(int temperature)
    {
        Console.WriteLine("The temperature is " + (temperature * 100));
    }

    public EvilSubscriber2(WeatherStation2 weatherStation)
    {
        this.weatherStation = weatherStation;

        // Broadcast to all the subscriber         
        weatherStation.Reporter(60); // Compiler Error                

        // Reassign the subscriber                
        weatherStation.Reporter = EvilMessage; // Compiler Error  

        // Replace all the subscribers                 
        weatherStation.Reporter = null; // Compiler Error    
    }
}

Program.cs

namespace DelegatesAndEvents
{
    public delegate void TemperatureReporter(int tempearture);

    class Program
    {
        static void Main(string[] args)
        {
            // Observer Pattern Using Delegates
            WeatherStation weatherStation = new WeatherStation();
            FlashNews flashNews = new FlashNews(weatherStation);
            NewsFeed newsFeed = new NewsFeed(weatherStation);
            weatherStation.Temperature = 30;
            weatherStation.Temperature = 15;
            weatherStation.Temperature = 45;
        }
    }
}

PubSub.cs

namespace DelegatesAndEvents
{
    class WeatherStation
    {
        private int _temperature;
        public TemperatureReporter Reporter { get; set; }

        public int Temperature
        {
            get { return _temperature; }
            set
            {
                if (Reporter != null)
                {
                    Reporter(value);
                }
                _tempearture = value;
            }
        }
    }

    class NewsFeed
    {
        WeatherStation weatherStation;

        public void AddTemperatureInfoToFeed(int temperature)
        {
            Console.WriteLine("News Feed: New temperature " + temperature + " added to feed.");
        }

        public NewsFeed(WeatherStation weatherStation)
        {
            this.weatherStation = weatherStation;
            weatherStation.Reporter += AddTemperatureInfoToFeed;
        }
    }

    class FlashNews
    {
        WeatherStation weatherStation;

        public void ShowTemperatureInfoInFlashNews(int temperature)
        {
            Console.WriteLine("Flash News: New temperature is " + temperature + ".");
        }

        public FlashNews(WeatherStation weatherStation)
        {
            this.weatherStation = weatherStation;
            weatherStation.Reporter += ShowTemperatureInfoInFlashNews;
        }
    }
}

PubSub2.cs

namespace DelegatesAndEvents
{ 
    class WeatherStation2 
    { 
        private int _tempearture; 
        
        public event TemperatureReporter Reporter; 
        
        public int Temperature 
        { 
            get 
            { 
                return _tempearture; 
            } 
            set 
            { 
                if (Reporter != null) 
                { 
                    Reporter(value); 
                } 
                _tempearture = value; 
            } 
        }
    } 
    
    class NewsFeed2 
    { 
        WeatherStation2 weatherStation; 
        
        public void AddTemperatureInfoToFeed(int temperature) 
        { 
            Console.WriteLine("News Feed2: New temperature " + temperature + " added to feed."); 
        } 
        
        public NewsFeed2(WeatherStation2 weatherStation) 
        { 
            this.weatherStation = weatherStation; 
            weatherStation.Reporter += AddTemperatureInfoToFeed; 
        } 
    } 
    
    class FlashNews2 
    { 
        
        WeatherStation2 weatherStation; 
        
        public void ShowTemperatureInfoInFlashNews(int temperature) 
        { 
            Console.WriteLine("Flash News2: New temperature is " + temperature + "."); 
        } 
        
        public FlashNews2(WeatherStation2 weatherStation) 
        { 
            this.weatherStation = weatherStation; weatherStation.Reporter += ShowTemperatureInfoInFlashNews; 
        } 
    } 
}