這是我的測試課[TestClass]public class FooServiceTest{    private IYourRepository _yourRepository;    [TestInitialize]    public void Initialize()    {        _yourRepository = new Mock<YourRepository>().Object;    }    [TestMethod]    public void GetPushableEntries_gets_all_pushable_entries()    {        var yourObjectList = new List<YourObject>        {            new WaitingQueue            {                                   ProfileId = 26,                IsDeleted = false,                Pushable = true            },            new WaitingQueue            {                                    ProfileId = 27,                IsDeleted = false,                Pushable = true            },            new WaitingQueue            {                                   ProfileId = 28,                IsDeleted = false,                Pushable = false            }        };        foreach (var yourObject in yourObjectList)        {            _yourRepository.Create(yourObject);        }        var pushableEntries = _yourRepository.GetList(x => x.Pushable);        pushableEntries.Count.ShouldEqual(2);        pushableEntries.ShouldNotBeNull();        pushableEntries.ShouldBe<IReadOnlyCollection<WaitingQueue>>();    }}這是ShouldEqual方法public static T ShouldEqual<T>(this T actual, object expected){    Assert.AreEqual(expected, actual);    return actual;}這是GetList方法public IReadOnlyCollection<T> GetList(Expression<Func<T, bool>> @where, params Expression<Func<T, object>>[] nav){    using (var dbContext = new MyDbContext())    {        return GetFiltered(dbContext, nav).Where(where).ToList();    }}每次我運行GetPushableQueues_gets_all_pushable_entries()方法實際值增加2。Assert.AreEqual failed. Expected:<2>. Actual:<2>. //first runAssert.AreEqual failed. Expected:<2>. Actual:<4>. //second runAssert.AreEqual failed. Expected:<2>. Actual:<6>. //third run即使我清理測試項目并重建它，這個問題仍然存在。知道為什么會發生這種情況以及我錯過了什么嗎？注意：還有其他測試方法使用_yourRepository和調用Create方法來創建實體。