static void Main(string[] args)
        {
            string weather = "rainy";

            ChangeTheString(weather);
            Console.WriteLine($"The weather is " + weather);

            string[] rainyDays = { "Monday", "Friday" };
            ChangeTheArray(rainyDays);
            Console.WriteLine($"The rainy days are " + rainyDays[0] + " and " + rainyDays[1]);

            Forecast forecast = new Forecast {
                Pressure = 700, Temperature = 20
            };

            ChangeTheClassInstance(forecast);
            Console.WriteLine("The temparature is " + forecast.Temperature + " C");
            Console.ReadKey();
        }
 public static void ChangeTheClassInstance(Forecast forecast)
 {
     forecast.Temperature = 35;
 }