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 Hallo_Welt{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void CB1_CheckedChanged(object sender, EventArgs e) { if (CB1.Checked == true) { CB2.Checked = false; } } private void CB2_CheckedChanged(object sender, EventArgs e) { if (CB2.Checked == true) { CB1.Checked = false; } } private void Button1_Click(object sender, EventArgs e) { if (CB1.Checked == true) { Textausgabe.Text = CB1.Text; } else if (CB2.Checked== true) { Textausgabe.Text = CB2.Text; } else { Textausgabe.Text = "Nichts ausgewählt!"; } } }}