static void Main(string[] args)
{
Console.WriteLine("Write name: ");
string name = Console.ReadLine();
Console.WriteLine("Write ID: "); //Вывод данных студента
string id = Console.ReadLine();
Console.WriteLine("Write year of study: ");
string num = Console.ReadLine();
int yearofstudy;
yearofstudy = int.Parse(num);
Student student = new Student(name, id); // конструктор
Console.WriteLine("Next Year of study: " + student.Nextyear(yearofstudy));
Console.ReadKey();
}