Oef5p25

//Business.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Oef5p25KassaKorting
{
    class Business
    {
        private double bedrag;
        public double Bedrag
        {
            get { return bedrag; }
            set { bedrag = value; }
        }

        public double berekenTeBetalen(double pbedrag)
        {
            double korting = 0.0;
            if (pbedrag<50)
            {
                korting = 2.5;
            }
            else if (pbedrag<100)
            {
                korting = 5;
            }
            else if (pbedrag<200)
            {
                korting = 10;
            }
            else
            {
                korting = 20;
            }
            return pbedrag * (1 - korting / 100);
        }
    }
}


//Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Oef5p25KassaKorting
{
    public partial class Form1 : Form
    {


        public Form1()
        {
            InitializeComponent();
        }

        private void btnBereken_Click(object sender, EventArgs e)
        {
            Business rekenen = new Business();
            rekenen.Bedrag = Convert.ToDouble(txtBedrag.Text);
            MessageBox.Show("Je betaalt " + rekenen.berekenTeBetalen(rekenen.Bedrag) + " euro");
        }
    }
}