read more than one image from database

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C#

i am trying to get image saved in the database. i used the code below but it wont return image.

if (Request.QueryString["ProductID"] != null)
{
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ProdDB"].ConnectionString);
    string query = "SELECT ProductID, ProductName, ProductImage FROM Product";

    SqlDataAdapter da = new SqlDataAdapter(query, con);
    DataTable dt = new DataTable();

    da.Fill(dt);
    for (int i = 0; i < dt.Rows.Count; i++ ){
        if (dt != null) {       
             Byte[] bytes = (Byte[])dt.Rows[i]["ProductImage"];     
            Response.Buffer = true;
            Response.Charset = "";
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.ContentType = "Image/png";
            Response.AddHeader("content-disposition", "attachment;filename="
            + dt.Rows[i]["ProductName"].ToString());
            Response.BinaryWrite(bytes); 
            Response.Flush();    
        }      
    }  
    Response.Flush();
    Response.End ();
}

[Edit]Added Pre Tag : Amit Kumar[/Edit]