static void Main(string[] args)
        {
            ExDeviderV2.AdditionalEx();

            Notebook notebook = new Notebook("Banana", "Mama Africa", 999);

            new Notebook().Show();

            ExDeviderV2.Ex2();

            Train[] bigTrain = new Train[3];

            ClassForTrain trainClass = new ClassForTrain();

            trainClass.AddTrain(bigTrain);
            trainClass.Search(bigTrain);

            ExDeviderV2.Ex3();

            string  text     = "unchanged!!";
            MyClass myClass  = new MyClass(text);
            var     myStruct = new MyStruct(text);

            Console.WriteLine(myClass.change);
            Console.WriteLine(myStruct.change);

            ExDeviderV2.Line();
            ClassTaker(myClass);
            StructTaker(myStruct);

            Console.WriteLine(myClass.change);
            Console.WriteLine(myStruct.change);
            ExDeviderV2.Line();

            Console.ReadKey();
        }