A CheckedListBox is a list control with multiple checkboxes. This allows the user to check multiple boxes at once.

How can I can get all the values they selected? By looping through the CheckedListBox.CheckedItems collection. See the UI and Code examples below.

UI

Code

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

namespace CheckedListBoxSelector
{
    public partial class frmProgrammingLangs : Form
    {
        public frmProgrammingLangs()
        {
            InitializeComponent();
        }

        private void btnSubmit_Click(object sender, EventArgs e)
        {
            var selectedLangs = new List<string>();

            foreach(var lang in clbLanguages.CheckedItems)
            {
                selectedLangs.Add(lang.ToString());
            }

            lblResult.Text = $"You selected: {string.Join(", ", selectedLangs)}";
        }
    }
}