public static void Main()
{
bool validArg = NumberValidator.IsValid(typeof(Student), 19000); // false
Console.WriteLine(validArg);
validArg = NumberValidator.IsValid(typeof(Student), 25000); // true
Console.WriteLine(validArg);
}
public static void Main()
{
Student s = new Student();
bool validArg = NumberValidator.SetValidNumber(s, 19000); // false
Console.WriteLine("Number {0} is valid? {1}", 1900, validArg);
Console.WriteLine("Student number: {0}", s.Nr);
validArg = NumberValidator.SetValidNumber(s, 25000); // true
Console.WriteLine("Number {0} is valid? {1}", 25000, validArg);
Console.WriteLine("Student number: {0}", s.Nr);
}