Linq查询不会从另一个对象中的对象返回结果

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

namespace ConsoleApp2
{
    class Program
    {
        public class Associate
        {
            public string AssocType { get; set; }
            public Contact contact { get; set; }
            public Associate(string assocType)
            {
                AssocType = assocType;
                //contact = new Contact("Contact 1", 1234);
                //contact2 = new Contact("Contact 2", 23456);
            }
        }
        public class Contact
        {
            string v1;
            int v2;
            public Contact(string v1, int v2) { this.v1 = v1; this.v2 = v2; }
            public string Name { get; set; }
            public int ID { get; set; }
        }

        static void Main(string[] args)
        {
            Associate assoc1 = new Associate("Type1");
            assoc1.contact = new Contact("Contact 1", 9876);
            Associate assoc2 = new Associate("Type2");
            assoc2.contact = new Contact("Contact 2", 1234);
            List<Associate> aList = new List<Associate>
            {
                assoc1,assoc2
            };
            var contactname = aList
                .Where(s => s.AssocType == "Type1")
                .Select(s => s.contact.Name)
                .FirstOrDefault();
            Console.Write(contactname);
            Console.Read();

        }
    }
}

这个 contactname 变量显示为null,但应返回 Contact 1 一串。我已签入调试器,所有对象都已正确设置并具有适当的值。我做错了什么?

var contact name = aList... 但我不认为它是正确的,因为它不会编译,因为 Type inference failed .

        var name = from Associate in aList
                   from Contact in Associate
                   where Associate.AssocType == "Type1"
                   select Contact.Name;