Binding DropDownlist or Select from javascript in asp.net using jquery

Bind DropDownlist/select with JQuery in Asp.Net as follows

<script src="js/jquery-1.2.6.min.js" type="text/javascript"></script>
<script src="js/jquery.selectboxes.min.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
$(function(){    getModels();   });
function getModels()
{
    $.ajax({
        type: "POST",
        url: "Myservice.asmx/LoadCountries",
        data: "{}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function(response) {
            $.each(response.d, function(i, _response) {
                $('#ddlCountry').append('<option value="' + _response.ID+ '">' + _response.Name + '</option>'); });
        }
    });
}
</script>

<div>
        <select id="ddlCountry" name="ddlCountry"></select>
</div>

Myservice.asmx code follows here

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;
using System.Data;
using System.Web.Script.Services;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]

public class Myservice : System.Web.Services.WebService
{
    [WebMethod]
    public List<Country> LoadCountries()
    {
        SqlConnection con = new SqlConnection(@"your connection");
        SqlCommand cmd = new SqlCommand("select ID,Name from CountryTable",con);
        con.Open();
        DataSet ds=new DataSet();
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        da.Fill(ds);
        List<Country> Countries = new List<Country>();
        Country c = new Country();
        if (ds.Tables[0].Rows.Count > 0)
        {
            c.ID = "0";
            c.Name = "--Select--";
            Countries.Add(c);
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                c = new Country();
                c.ID = ds.Tables[0].Rows[i]["ID"].ToString();
                c.Name = ds.Tables[0].Rows[i]["Name"].ToString();
                Countries.Add(c);
            }
        }
        return Countries;
    }
}

public class Country
{
    private string _ID;
    private string _Name;
    public string ID
    {
        get { return _ID; }
        set { _ID = value; }
    }
    public string Name
    {
        get { return _Name; }
        set { _Name = value; }
    }
}

o/p:

Tag: asmx, Asp.net, calling server method from javascript, jquery, multiline dropdownlist asp.net, select