CheckBoxList Control in ASP.NET

Example

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI.WebControls;
public partial class ListControls : System.Web.UI.Page
{   
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            List<string> educationList = new List<string>();
            educationList.Add("MBA");
            educationList.Add("MCA");
            educationList.Add("BE");
            educationList.Add("B.Tech");
            educationList.Add("B.Arch");
            educationList.Add("PHD");
            CheckBoxList1.DataSource = educationList;
            CheckBoxList1.DataBind();
        }
    }    
    protected void Button1_Click(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();
        foreach (ListItem item in CheckBoxList1.Items)
        {
            if (item.Selected)
            {
                sb.Append("</br>"+item );
            }
        }
        Label1.Text ="You have selected :"+ sb.ToString();     
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (CheckBoxList1.RepeatDirection == RepeatDirection.Vertical)
        {
            CheckBoxList1.RepeatDirection = RepeatDirection.Horizontal;
        }
        else
        {
            CheckBoxList1.RepeatDirection = RepeatDirection.Vertical;
        }
    }    
}