static void Main(string[] args) { WeatherData weatherData = new WeatherData(); TemperatureObserver temperatureObserver = new TemperatureObserver(weatherData); PressureObserver pressureObserver = new PressureObserver(weatherData); weatherData.SetMeasurements(30, 20, 10); weatherData.SetMeasurements(20, 40, 5); weatherData.UnregisterObserver(temperatureObserver); weatherData.SetMeasurements(10, 50, 15); }