using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int baslama, bitis, artma;
            baslama = Convert.ToInt32(textBox1.Text);
            bitis = Convert.ToInt32(textBox2.Text);
            artma = Convert.ToInt32(textBox3.Text);
            if (textBox1.Text == "" && textBox2.Text == "" && textBox3.Text == "")
            {
                MessageBox.Show("sayı giriniz");
            }
            else
            {
                listBox1.Items.Clear();
                for (int i = baslama; i <= bitis; i += artma)
                {
                    listBox1.Items.Add(i.ToString());
                }
            }
        }            
    }
}