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 WindowsFormsApp5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            label1.Text = "Plox";
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            int plox;
            int plox2;
            int max;
            listBox1.Items.Clear();
            if (textBox1.Text != "" && textBox2.Text != "")
            {
                try
                {
                    plox = Convert.ToInt32(textBox1.Text);
                    plox2 = Convert.ToInt32(textBox2.Text);
                    if (plox > plox2)
                    {
                        max = plox;
                    }
                    else
                    {
                        max = plox2;
                    }
                    for (int i = 1; i <= max; i++)
                    {
                        if (plox % i == 0 && plox2 % i == 0)
                        {
                            listBox1.Items.Add(i);
                            label1.Text = Convert.ToString(i);
                        }
                    }

                }
                catch
                {
                    label1.Text = "Bitte Gültige werte eingeben";
                }
            }
            else
            {
                label1.Text = "Bitte Gültige werte eingeben";
            }

        }
    }
}