Move items from one CheckBoxList to another in ASP.Net

This tutorial will explain you how to move list items from one CheckBoxList to another CheckBoxList in ASP.Net using C#

ASP.Net

<asp:Label ID="lblMsg" runat="server"></asp:Label>
<table class="table table-bordered">
    <thead>
        <tr>
            <th>CheckBosList 1</th>
            <th></th>
            <th>CheckBoxList 2</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>
                <asp:CheckBoxList ID="CheckBoxList1" runat="server" CssClass="checkbox-inline"></asp:CheckBoxList>
            </td>
            <td class="text-center">
                <button type="submit" id="btnLTR" class="button" runat="server" onserverclick="btnLTR_ServerClick" data-loading-text="<i class='fa fa-refresh fa-spin' style='font-size:16px; color:#fff;'></i>">
                    <i class="fa fa-chevron-right" style="color: #fff;"></i>
                </button>
                <br />
                <button type="submit" id="btnRTL" class="button" runat="server" onserverclick="btnRTL_ServerClick" data-loading-text="<i class='fa fa-refresh fa-spin' style='font-size:16px; color:#fff;'></i>">
                    <i class="fa fa-chevron-left" style="color: #fff;"></i>
                </button>
            </td>
            <td>
                <asp:CheckBoxList ID="CheckBoxList2" runat="server" CssClass="checkbox-inline"></asp:CheckBoxList>
            </td>
        </tr>
    </tbody>
</table>

C#

using System;
using System.Web.UI.WebControls;

using System.Collections;  // For ArrayList

public partial class VC : System.Web.UI.Page
{
    ArrayList arraylist1 = new ArrayList();
    ArrayList arraylist2 = new ArrayList();

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            CheckBoxList1.Items.Add("ASP.Net");
            CheckBoxList1.Items.Add("C#");
            CheckBoxList1.Items.Add("Vb.net");
            CheckBoxList1.Items.Add("jQuery");
            CheckBoxList1.Items.Add("Javascript");
            CheckBoxList1.Items.Add("SQL Server");
            CheckBoxList1.Items.Add("Ajax");
            CheckBoxList1.Items.Add("Html");
            CheckBoxList1.Items.Add("Css");
        }
    }
    protected void btnLTR_ServerClick(object sender, EventArgs e)
    {
        try
        {
            if (CheckBoxList1.SelectedIndex >= 0)
            {
                lblMsg.Text = String.Empty;
                for (int i = 0; i < CheckBoxList1.Items.Count; i++)
                {
                    if (CheckBoxList1.Items[i].Selected)
                        if (!arraylist1.Contains(CheckBoxList1.Items[i]))
                            arraylist1.Add(CheckBoxList1.Items[i]);

                }
                for (int i = 0; i < arraylist1.Count; i++)
                {
                    if (!CheckBoxList2.Items.Contains(((ListItem)arraylist1[i])))
                        CheckBoxList2.Items.Add(((ListItem)arraylist1[i]));
                    CheckBoxList1.Items.Remove(((ListItem)arraylist1[i]));
                }
                CheckBoxList2.SelectedIndex = -1;
            }
            else
            {
                lblMsg.Text = "Please select atleast one item from CheckBoxList 1";
                if (CheckBoxList1.Items.Count == 0)
                    lblMsg.Text = "CheckBoxList 1 is empty";
            }
        }
        catch { }
    }

    protected void btnRTL_ServerClick(object sender, EventArgs e)
    {
        try
        {
            if (CheckBoxList2.SelectedIndex >= 0)
            {
                lblMsg.Text = String.Empty;
                for (int i = 0; i < CheckBoxList2.Items.Count; i++)
                {
                    if (CheckBoxList2.Items[i].Selected)
                        if (!arraylist2.Contains(CheckBoxList2.Items[i]))
                            arraylist2.Add(CheckBoxList2.Items[i]);
                }
                for (int i = 0; i < arraylist2.Count; i++)
                {
                    if (!CheckBoxList1.Items.Contains(((ListItem)arraylist2[i])))
                        CheckBoxList1.Items.Add(((ListItem)arraylist2[i]));
                    CheckBoxList2.Items.Remove(((ListItem)arraylist2[i]));
                }
                CheckBoxList1.SelectedIndex = -1;
            }
            else
            {
                lblMsg.Text = "Please select atleast one item from CheckBoxList 2";
                if (CheckBoxList2.Items.Count == 0)
                    lblMsg.Text = "CheckBoxList 2 is empty";
            }
        }
        catch { }
    }
}