how can save multiple checkbox in database?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace InsertmultipleValueCheckBoxList
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            checkedListBox1.Items.Add("Raj");
            checkedListBox1.Items.Add("Ravi");
            checkedListBox1.Items.Add("Rahul ");
        }

        private void btn_insert_Click(object sender, EventArgs e)
        {
            OleDbConnection con = new OleDbConnection(ConnectionString);
            foreach (var checkedItem in this.checkedListBox1.CheckedItems)
            {
                com = new OleDbCommand("Insert into test values('" + checkedItem + "')", con);
                con.Open();
                com.ExecuteNonQuery();
                con.Close();
            }
            MessageBox.Show("Inserted Successfully");
        }
    }
}