Implementing RequireJs on BackboneJs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
using RazorApp.Models;

namespace RazorApp.ViewModels
{
    public class ShoppingCartViewModel
    {
        public List<Cart> CartItems { get; set; }
        public decimal CartTotal { get; set; }
        public int CartItemsCount
        {
            get { return CartItems.Sum(x => x.Count); }
        }
    }

    public class ShoppingCartRemoveViewModel
    {
        public string Message { get; set; }
        public decimal CartTotal { get; set; }
        public int CartCount { get; set; }
        public int ItemCount { get; set; }
        public int DeleteId { get; set; }
    }

    public class SearchAlbumViewModel
    {
        public int? SearchGenreId { get; set; }
        public int? SearchArtistId { get; set; }
        public string SearchTitle { get; set; }
    }



    public class AlbumSearchViewModel
    {
        public int AlbumId { get; set; }
    }
}