在Where（）内部包含（）不返回结果 - Linq

Question

我遇到了一些linq问题。我正在尝试获取一个对象列表，如果特定Id包含在我的ID列表中，则该对象列表会被删除。这是代码示例：

public IServiceResult<List<SurveyAnswer>> GetSurveyProjectSite(List<Guid>spsQsIds)
{

    return this.Wrap(() =>
    {

        this.InspectionContext.Configuration.LazyLoadingEnabled = false;

        List<SurveyProjectSiteQuestionResponse> response = new List<SurveyProjectSiteQuestionResponse>();
        List<SurveyAnswer> answers = new List<SurveyAnswer>();

        var newList = this.InspectionContext.SurveyProjectSiteQuestionResponses
            .Include("SurveyAnswer")
            .Where(x => spsQsIds.Contains(x.SurveyProjectSiteQuestionSetId));

        response.AddRange(newList);

        foreach (SurveyProjectSiteQuestionResponse r in response)
        {
            answers.Add(r.SurveyAnswer);
        }

        return answers;
    });
}

类别：

public class SurveyProjectSiteQuestionResponse : IDentifiable<Guid>, IPushable, IPullable
{
    [ProtoMember(1)]
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public Guid Id { get; set; }

    [ProtoMember(2)]
    public Guid SurveyProjectSiteQuestionSetId { get; set; }

    [ForeignKey("SurveyProjectSiteQuestionSetId")]
    public virtual SurveyProjectSiteQuestionSet SurveyProjectSiteQuestionSet { get; set; }

    [ProtoMember(3)]
    public long SurveyQuestionId { get; set; }

    [ForeignKey("SurveyQuestionId")]
    public virtual SurveyQuestion SurveyQuestion { get; set; }

    [ProtoMember(4)]
    public Guid SurveyAnswerId { get; set; }

    [ForeignKey("SurveyAnswerId")]
    public virtual SurveyAnswer SurveyAnswer { get; set; }

    [ProtoMember(5)]
    public long UserId { get; set; }

    [ForeignKey("UserId")]
    public virtual User User { get; set; }

    [ProtoMember(6)]
    [Required]
    public DateTime ResponseDate { get; set; }

    [ProtoMember(7)]
    [Column(TypeName = "datetime")]
    public DateTime ModifiedDate { get; set; }

}

Where（）中存在问题。当我在其中包含Contains（）时，我不会得到任何结果。我检查了我的Guids，我正在测试的实例有77个匹配。是否存在阻止Contains（）在Where（）中正常工作的内容。提前感谢您的帮助。