Build a Google IG like AJAX Start Page in 7 days using ASP.NET AJAX and .NET 3.0

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
namespace DashboardDataAccess
{
    public static class DatabaseHelper
    {
        public const string ConnectionStringName = "DashboardConnectionString";
        public const string ApplicationID = "fd639154-299a-4a9d-b273-69dc28eb6388";
        public readonly static Guid ApplicationGuid = new Guid(ApplicationID);

        public static DashboardData GetDashboardData()
        {
            var db = new DashboardData(ConfigurationManager.ConnectionStrings[ConnectionStringName].ConnectionString);
            return db;
        }
        
        public static void Update<T>(T obj, Action<T> update)
        {
            var db = GetDashboardData();
            db.GetTable<T>().Attach(obj);
            update(obj);
            db.SubmitChanges();
        }
        public static void UpdateAll<T>(List<T> items, Action<T> update)
        {
            var db = GetDashboardData();
            
            foreach( T item in items )
            {
                db.GetTable<T>().Attach(item);
                update(item);
            }

            db.SubmitChanges();
        }
        public static void Delete<T>(Action<T> makeTemplate) where T:new()
        {
            var db = GetDashboardData();
            T template = new T();
            makeTemplate(template);
            db.GetTable<T>().Remove(template);
            db.SubmitChanges();
        }
        public static void Insert<T>(T obj)
        {
            var db = GetDashboardData();
            db.GetTable<T>().Add(obj);
            db.SubmitChanges();
        }
    }
}