public static void Main()
{
var student = new Student("Koko", 19);
student.OnChange += EventChanges;
student.Name = "Milko";
student.Age = 21;
}
static void Main(string[] args)
{
Student student = new Student("Peter", 22);
student.PropertyChanged += (sender, eventArgs) =>
{
Console.WriteLine("Property changed: {0} (from {1} to {2})",
eventArgs.PropertyName, eventArgs.OldValue, eventArgs.NewValue);
};
student.Name = "Maria";
student.Age = 19;
}