eShopOnContainers/src/Web/WebMVC/ViewModels/CartViewModels/IndexViewModel.cs

using Microsoft.AspNetCore.Mvc.Rendering;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Microsoft.eShopOnContainers.WebMVC.ViewModels.CartViewModels
{
    public class CartComponentViewModel
    {
        public int ItemsCount { get; set; }
        public string Disabled { get { return (ItemsCount == 0) ? "is-disabled" : ""; } }
    }
}