/// <summary>
/// The entry point of the program, where the program control starts and ends.
/// </summary>
/// <param name="args">The command-line arguments.</param>
public static void Main(string[] args)
{
Student student = new Student ();
student._age = 28;
Calculate (student);
Console.WriteLine (student._age);
Console.ReadLine ();
}
/// <summary>
/// Calculate the specified student.
/// </summary>
/// <param name="student">Student.</param>
static void Calculate(Student student)
{
student._age += 1;
}