using System;

public class Program

{

    public static void Main()

    {

        Student ads = new Student();

        try{

        ads.Gpa = 0.2;

        Console.WriteLine(ads.Gpa);

        }

        catch(ArgumentException e){

            Console.WriteLine("Get out of my sight.");

            Console.WriteLine(e);

        }

    }

}

​

class Student

{

    private double gpa = 0;

    public double Gpa

    {

        get{return this.gpa;}

        set{if(value > 4.0 || value < 0.4){

        throw new ArgumentException();

        }else{

            this.gpa = value;

            }

        }

    }

}