Creating Instances of UserControls Declaratively and Programmatically

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;

public partial class Controls_ItemSummary : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected override void OnPreRender(EventArgs e)
    {
        imgItem.ImageUrl = itemImageURL; // sets the Image to be shown in heading
        lblSummary.Text = itemSummary;
    }

    /// <summary>
    /// to get item summary
    /// </summary>
    private string itemSummary;
    public string ItemSummary
    {
        get { return itemSummary; }
        set { itemSummary = value; }
    }

    /// <summary>
    /// to get set item image URL
    /// </summary>
    private string itemImageURL;
    public string ItemImageURL
    {
        get { return itemImageURL; }
        set { itemImageURL = value; }
    }
}