字典是否比列表中的linq快?

我一般使用 List<T> 收藏。 但是,如果我需要对集合进行快速查找,例如,在下面的示例中,我将使用字典,以便通过 id :

Dictionary<int, Customer>

但是因为我可以用LINQ查询 列表& T; 不管怎样,如下面所述,有没有理由用字典来代替列表? 字典更快还是Linq在幕后做的事情也同样快?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Customer> customers = new List<Customer>()
            {
             new Customer { Id = 234, FirstName = "Jim", LastName = "Smith" },
             new Customer { Id = 345, FirstName = "John", LastName = "Thomas" },
             new Customer { Id = 654, FirstName = "Rick", LastName = "Ashton" },
             new Customer { Id = 948, FirstName = "Rod", LastName = "Anders" }
            };

            var customer = (from c in customers
                           where c.Id == 654 select c).SingleOrDefault();
            Console.WriteLine(customer.Display());

            Console.ReadLine();

        }
    }


    public class Customer
    {
        public int Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }

        internal string Display()
        {
            return String.Format("{0}, {1} ({2})", LastName, FirstName, Id);
        }

    }
}