Save Multiple ListBox selected Items in Database with commas using C# in ASP.Net

Hi Indresh,

I am not able to configure the C# due to lots of my trial and errors. Please review it, It doesnt carry the additional fields yet

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Collections.Specialized;
using System.Text;

public partial class Default : System.Web.UI.Page
{
    private string GetConnectionString()
    {
        //Where DBConnection is the connetion string that was set up in the web config file        
        return System.Configuration.ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        string strEmployeeName = string.Empty;
        foreach (ListItem item in ListBox1.Items)
        {
            if (item.Selected)
            {
                strEmployeeName += item.Text + ",";
            }
        }
        InsertRecords(strEmployeeName.Remove(strEmployeeName.Length - 1));
    }
    private void InsertRecords(string employeeName)
    {
        SqlConnection conn = new SqlConnection(GetConnectionString());
        SqlCommand cmd = new SqlCommand("INSERT INTO Table1 (Employees) Values(@EmployeeName)", conn);
        cmd.CommandType = CommandType.Text; cmd.Parameters.AddWithValue("@EmployeeName", employeeName);
        conn.Open(); cmd.ExecuteNonQuery();
        conn.Close();
        Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Script", "alert('Records Successfuly Saved!');", true);
    }
}