Asp.net mvc 2 序列化对象时检测到循环引用。这个错误到底是什么？
我想将Asp.net mvc 2 序列化对象时检测到循环引用。这个错误到底是什么？,asp.net-mvc-2,serialization,Asp.net Mvc 2,Serialization,我想将列表对象序列化为JSON数据 我当前在ASP.NET MVC应用程序中使用的代码是： List<Question> questionList; questionList = questionManager.GetquestionsByTestId(id); var listData = questionList.ToArray(); JavaScriptSerializer seri
列表List<Question> questionList;
questionList = questionManager.GetquestionsByTestId(id);
var listData = questionList.ToArray();
JavaScriptSerializer serializer = new JavaScriptSerializer();
string strData = serializer.Serialize(listData);
JsonResult json = Json(strData, JsonRequestBehavior.AllowGet);
public partial class Question : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _QuestionId;
private string _QuestionText;
private System.Nullable<int> _TopicId;
private System.Nullable<int> _Marks;
private System.Nullable<int> _QuestionTypeId;
private System.Nullable<int> _ChapterId;
private System.Nullable<int> _Weightage;
private System.Nullable<System.TimeSpan> _ExpectedTimeToAnswer;
private EntitySet<Answer> _Answers;
private EntitySet<TestDetail> _TestDetails;
private EntityRef<Chapter> _Chapter;
private EntityRef<QuestionType> _QuestionType;
private EntityRef<Topic> _Topic;
#region Extensibility Method Definitions
partial void OnLoaded();
partial void OnValidate(System.Data.Linq.ChangeAction action);
partial void OnCreated();
partial void OnQuestionIdChanging(int value);
partial void OnQuestionIdChanged();
partial void OnQuestionTextChanging(string value);
partial void OnQuestionTextChanged();
partial void OnTopicIdChanging(System.Nullable<int> value);
partial void OnTopicIdChanged();
partial void OnMarksChanging(System.Nullable<int> value);
partial void OnMarksChanged();
partial void OnQuestionTypeIdChanging(System.Nullable<int> value);
partial void OnQuestionTypeIdChanged();
partial void OnChapterIdChanging(System.Nullable<int> value);
partial void OnChapterIdChanged();
partial void OnWeightageChanging(System.Nullable<int> value);
partial void OnWeightageChanged();
partial void OnExpectedTimeToAnswerChanging(System.Nullable<System.TimeSpan> value);
partial void OnExpectedTimeToAnswerChanged();
#endregion
public Question()
{
this._Answers = new EntitySet<Answer>(new Action<Answer>(this.attach_Answers), new Action<Answer>(this.detach_Answers));
this._TestDetails = new EntitySet<TestDetail>(new Action<TestDetail>(this.attach_TestDetails), new Action<TestDetail>(this.detach_TestDetails));
this._Chapter = default(EntityRef<Chapter>);
this._QuestionType = default(EntityRef<QuestionType>);
this._Topic = default(EntityRef<Topic>);
OnCreated();
}
[Column(Storage="_QuestionId", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int QuestionId
{
get
{
return this._QuestionId;
}
set
{
if ((this._QuestionId != value))
{
this.OnQuestionIdChanging(value);
this.SendPropertyChanging();
this._QuestionId = value;
this.SendPropertyChanged("QuestionId");
this.OnQuestionIdChanged();
}
}
}
[Column(Storage="_QuestionText", DbType="NVarChar(MAX)")]
public string QuestionText
{
get
{
return this._QuestionText;
}
set
{
if ((this._QuestionText != value))
{
this.OnQuestionTextChanging(value);
this.SendPropertyChanging();
this._QuestionText = value;
this.SendPropertyChanged("QuestionText");
this.OnQuestionTextChanged();
}
}
}
[Column(Storage="_TopicId", DbType="Int")]
public System.Nullable<int> TopicId
{
get
{
return this._TopicId;
}
set
{
if ((this._TopicId != value))
{
if (this._Topic.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnTopicIdChanging(value);
this.SendPropertyChanging();
this._TopicId = value;
this.SendPropertyChanged("TopicId");
this.OnTopicIdChanged();
}
}
}
[Column(Storage="_Marks", DbType="Int")]
public System.Nullable<int> Marks
{
get
{
return this._Marks;
}
set
{
if ((this._Marks != value))
{
this.OnMarksChanging(value);
this.SendPropertyChanging();
this._Marks = value;
this.SendPropertyChanged("Marks");
this.OnMarksChanged();
}
}
}
[Column(Storage="_QuestionTypeId", DbType="Int")]
public System.Nullable<int> QuestionTypeId
{
get
{
return this._QuestionTypeId;
}
set
{
if ((this._QuestionTypeId != value))
{
if (this._QuestionType.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnQuestionTypeIdChanging(value);
this.SendPropertyChanging();
this._QuestionTypeId = value;
this.SendPropertyChanged("QuestionTypeId");
this.OnQuestionTypeIdChanged();
}
}
}
[Column(Storage="_ChapterId", DbType="Int")]
public System.Nullable<int> ChapterId
{
get
{
return this._ChapterId;
}
set
{
if ((this._ChapterId != value))
{
if (this._Chapter.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnChapterIdChanging(value);
this.SendPropertyChanging();
this._ChapterId = value;
this.SendPropertyChanged("ChapterId");
this.OnChapterIdChanged();
}
}
}
[Column(Storage="_Weightage", DbType="Int")]
public System.Nullable<int> Weightage
{
get
{
return this._Weightage;
}
set
{
if ((this._Weightage != value))
{
this.OnWeightageChanging(value);
this.SendPropertyChanging();
this._Weightage = value;
this.SendPropertyChanged("Weightage");
this.OnWeightageChanged();
}
}
}
[Column(Storage="_ExpectedTimeToAnswer", DbType="Time")]
public System.Nullable<System.TimeSpan> ExpectedTimeToAnswer
{
get
{
return this._ExpectedTimeToAnswer;
}
set
{
if ((this._ExpectedTimeToAnswer != value))
{
this.OnExpectedTimeToAnswerChanging(value);
this.SendPropertyChanging();
this._ExpectedTimeToAnswer = value;
this.SendPropertyChanged("ExpectedTimeToAnswer");
this.OnExpectedTimeToAnswerChanged();
}
}
}
[Association(Name="Question_Answer", Storage="_Answers", ThisKey="QuestionId", OtherKey="QuestionId")]
public EntitySet<Answer> Answers
{
get
{
return this._Answers;
}
set
{
this._Answers.Assign(value);
}
}
[Association(Name="Question_TestDetail", Storage="_TestDetails", ThisKey="QuestionId", OtherKey="QuestionId")]
public EntitySet<TestDetail> TestDetails
{
get
{
return this._TestDetails;
}
set
{
this._TestDetails.Assign(value);
}
}
[Association(Name="Chapter_Question", Storage="_Chapter", ThisKey="ChapterId", OtherKey="ChapterId", IsForeignKey=true)]
public Chapter Chapter
{
get
{
return this._Chapter.Entity;
}
set
{
Chapter previousValue = this._Chapter.Entity;
if (((previousValue != value)
|| (this._Chapter.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._Chapter.Entity = null;
previousValue.Questions.Remove(this);
}
this._Chapter.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._ChapterId = value.ChapterId;
}
else
{
this._ChapterId = default(Nullable<int>);
}
this.SendPropertyChanged("Chapter");
}
}
}
[Association(Name="QuestionType_Question", Storage="_QuestionType", ThisKey="QuestionTypeId", OtherKey="QuestionTypeId", IsForeignKey=true)]
public QuestionType QuestionType
{
get
{
return this._QuestionType.Entity;
}
set
{
QuestionType previousValue = this._QuestionType.Entity;
if (((previousValue != value)
|| (this._QuestionType.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._QuestionType.Entity = null;
previousValue.Questions.Remove(this);
}
this._QuestionType.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._QuestionTypeId = value.QuestionTypeId;
}
else
{
this._QuestionTypeId = default(Nullable<int>);
}
this.SendPropertyChanged("QuestionType");
}
}
}
[Association(Name="Topic_Question", Storage="_Topic", ThisKey="TopicId", OtherKey="TopicId", IsForeignKey=true)]
public Topic Topic
{
get
{
return this._Topic.Entity;
}
set
{
Topic previousValue = this._Topic.Entity;
if (((previousValue != value)
|| (this._Topic.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._Topic.Entity = null;
previousValue.Questions.Remove(this);
}
this._Topic.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._TopicId = value.TopicId;
}
else
{
this._TopicId = default(Nullable<int>);
}
this.SendPropertyChanged("Topic");
}
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
private void attach_Answers(Answer entity)
{
this.SendPropertyChanging();
entity.Question = this;
}
private void detach_Answers(Answer entity)
{
this.SendPropertyChanging();
entity.Question = null;
}
private void attach_TestDetails(TestDetail entity)
{
this.SendPropertyChanging();
entity.Question = this;
}
private void detach_TestDetails(TestDetail entity)
{
this.SendPropertyChanging();
entity.Question = null;
}
}
公共部分类问题：INotifyPropertyChanged，INotifyPropertyChanged
{
私有静态属性ChangingEventArgs emptyChangingEventArgs=新属性ChangingEventArgs（String.Empty）；
私人内部问题ID；
私有字符串(文本);；
私有系统。可为空的_TopicId；
私有系统。可为空的_标记；
私有系统。可为空的_QuestionTypeId；
私有系统。可为空的章；
私有系统。可为空的权重；
专用系统。可为空_ExpectedTimeToAnswer；
私有实体集_；
私有实体集_TestDetails；
私人实体参考章；
私有实体ref_问题类型；
私有实体引用主题；
#区域扩展性方法定义
局部空腔加载（）；
部分无效OnValidate（System.Data.Linq.ChangeAction）；
部分空白一经处理（）；
问题ID更改时部分无效（int值）；
QuestionIDChanged（）上的部分无效；
部分无效OnQuestionTextChangeing（字符串值）；
部分无效OnQuestionTextChanged（）；
局部无效OnTopicId更改（System.Nullable值）；
局部无效OnTopicIdChanged（）；
标记上的部分无效（System.Nullable值）；
在markschanged（）上的部分空白；
QuestionTypeIdChangeing部分无效（System.Nullable值）；
QuestionTypeIdChanged（）上的部分无效；
部分无效的分格更改（System.Nullable值）；
局部空洞onchapteredchanged（）；
权重更改时部分无效（System.Nullable值）；
权重更改时部分无效（）；
部分无效一个预期的TimeToAnswerChanged（System.Nullable值）；
部分无效OneExpectedTimeToAnswerChanged（）；
#端区
公众问题（
{
this.\u Answers=newentityset（新操作（this.attach\u Answers）、新操作（this.detach\u Answers））；
this._TestDetails=newentityset（新操作（this.attach_TestDetails）、新操作（this.detach_TestDetails））；
本章=默认值（EntityRef）；
此._QuestionType=默认值（EntityRef）；
此._Topic=default（EntityRef）；
OnCreated（）；
}
[列（Storage=“\u QuestionId”，AutoSync=AutoSync.OnInsert，DbType=“Int NOT NULL IDENTITY”，IsPrimaryKey=true，IsDbGenerated=true）]
公共int问题ID
{
得到
{
将此返回。\u QuestionId；
}
设置
{
if（（此._QuestionId！=值））
{
这是一个正在改变的问题（值）；
此参数为.SendPropertyChanging（）；
这个._QuestionId=值；
此.SendPropertyChanged（“问题ID”）；
这个.OnQuestionIdChanged（）；
}
}
}
[Column（Storage=“\u QuestionText”，DbType=“NVarChar（MAX）”）]
公共字符串文本
{
得到
{
返回此。\u问题文本；
}
设置
{
if（（此._QuestionText！=值））
{
此.onQuestionTextChangeing（值）；
此参数为.SendPropertyChanging（）；
这个._QuestionText=值；
此.SendPropertyChanged（“问题文本”）；
this.OnQuestionTextChanged（）；
}
}
}
[Column（Storage=“\u TopicId”，DbType=“Int”）]
公共系统。可为空的TopicId
{
得到
{
把这个还给我；
}
设置
{
如果（（此._TopicId！=值））
{
如果（此._主题.hasloadeOrassignedValue）
{
抛出新System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException（）；
}
这是一个改变（值）；
此参数为.SendPropertyChanging（）；
该值为.\u TopicId=值；
此项。SendPropertyChanged（“TopicId”）；
this.OnTopicIdChanged（）；
}
}
}
[Column（Storage=“_Marks”，DbType=“Int”）]
公共系统.可取消的标记
{
得到
{
把这个还给我；
}
设置
{
如果（（此._标记！=值））
{
这是一种价值观；
此参数为.SendPropertyChanging（）；
这个。_标记=值；
此项。SendPropertyChanged（“标记”）；
这个。OnMarksChanged（）；
}
}
}
[Column（Storage=“\u QuestionTypeId”，DbType=“Int”）]
公共系统。可为空的QuestionTypeId
{
得到
{
返回此。\u QuestionTypeId；
}
设置
{
if（（this.\u QuestionTypeId！=值））
{
如果（此._QuestionType.HasLoadedOrAssignedValue）
{
抛出新System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException（）；
}
此.onQuestionTypeIdChangeing（值）；
此参数为.SendPropertyChanging（）；
这个.\u QuestionTypeId=值；
此.SendPropertyChanged（“问题类型ID”）；
this.OnQuestionTypeIdChanged（）；
}
}
}
[Column（Storage=“\u ChapterId”，DbType=“Int”）]
公共系统。可为空
public partial class Question : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _QuestionId;
private string _QuestionText;
private System.Nullable<int> _TopicId;
private System.Nullable<int> _Marks;
private System.Nullable<int> _QuestionTypeId;
private System.Nullable<int> _ChapterId;
private System.Nullable<int> _Weightage;
private System.Nullable<System.TimeSpan> _ExpectedTimeToAnswer;
private EntitySet<Answer> _Answers;
private EntitySet<TestDetail> _TestDetails;
private EntityRef<Chapter> _Chapter;
private EntityRef<QuestionType> _QuestionType;
private EntityRef<Topic> _Topic;
#region Extensibility Method Definitions
partial void OnLoaded();
partial void OnValidate(System.Data.Linq.ChangeAction action);
partial void OnCreated();
partial void OnQuestionIdChanging(int value);
partial void OnQuestionIdChanged();
partial void OnQuestionTextChanging(string value);
partial void OnQuestionTextChanged();
partial void OnTopicIdChanging(System.Nullable<int> value);
partial void OnTopicIdChanged();
partial void OnMarksChanging(System.Nullable<int> value);
partial void OnMarksChanged();
partial void OnQuestionTypeIdChanging(System.Nullable<int> value);
partial void OnQuestionTypeIdChanged();
partial void OnChapterIdChanging(System.Nullable<int> value);
partial void OnChapterIdChanged();
partial void OnWeightageChanging(System.Nullable<int> value);
partial void OnWeightageChanged();
partial void OnExpectedTimeToAnswerChanging(System.Nullable<System.TimeSpan> value);
partial void OnExpectedTimeToAnswerChanged();
#endregion
public Question()
{
this._Answers = new EntitySet<Answer>(new Action<Answer>(this.attach_Answers), new Action<Answer>(this.detach_Answers));
this._TestDetails = new EntitySet<TestDetail>(new Action<TestDetail>(this.attach_TestDetails), new Action<TestDetail>(this.detach_TestDetails));
this._Chapter = default(EntityRef<Chapter>);
this._QuestionType = default(EntityRef<QuestionType>);
this._Topic = default(EntityRef<Topic>);
OnCreated();
}
[Column(Storage="_QuestionId", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int QuestionId
{
get
{
return this._QuestionId;
}
set
{
if ((this._QuestionId != value))
{
this.OnQuestionIdChanging(value);
this.SendPropertyChanging();
this._QuestionId = value;
this.SendPropertyChanged("QuestionId");
this.OnQuestionIdChanged();
}
}
}
[Column(Storage="_QuestionText", DbType="NVarChar(MAX)")]
public string QuestionText
{
get
{
return this._QuestionText;
}
set
{
if ((this._QuestionText != value))
{
this.OnQuestionTextChanging(value);
this.SendPropertyChanging();
this._QuestionText = value;
this.SendPropertyChanged("QuestionText");
this.OnQuestionTextChanged();
}
}
}
[Column(Storage="_TopicId", DbType="Int")]
public System.Nullable<int> TopicId
{
get
{
return this._TopicId;
}
set
{
if ((this._TopicId != value))
{
if (this._Topic.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnTopicIdChanging(value);
this.SendPropertyChanging();
this._TopicId = value;
this.SendPropertyChanged("TopicId");
this.OnTopicIdChanged();
}
}
}
[Column(Storage="_Marks", DbType="Int")]
public System.Nullable<int> Marks
{
get
{
return this._Marks;
}
set
{
if ((this._Marks != value))
{
this.OnMarksChanging(value);
this.SendPropertyChanging();
this._Marks = value;
this.SendPropertyChanged("Marks");
this.OnMarksChanged();
}
}
}
[Column(Storage="_QuestionTypeId", DbType="Int")]
public System.Nullable<int> QuestionTypeId
{
get
{
return this._QuestionTypeId;
}
set
{
if ((this._QuestionTypeId != value))
{
if (this._QuestionType.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnQuestionTypeIdChanging(value);
this.SendPropertyChanging();
this._QuestionTypeId = value;
this.SendPropertyChanged("QuestionTypeId");
this.OnQuestionTypeIdChanged();
}
}
}
[Column(Storage="_ChapterId", DbType="Int")]
public System.Nullable<int> ChapterId
{
get
{
return this._ChapterId;
}
set
{
if ((this._ChapterId != value))
{
if (this._Chapter.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.OnChapterIdChanging(value);
this.SendPropertyChanging();
this._ChapterId = value;
this.SendPropertyChanged("ChapterId");
this.OnChapterIdChanged();
}
}
}
[Column(Storage="_Weightage", DbType="Int")]
public System.Nullable<int> Weightage
{
get
{
return this._Weightage;
}
set
{
if ((this._Weightage != value))
{
this.OnWeightageChanging(value);
this.SendPropertyChanging();
this._Weightage = value;
this.SendPropertyChanged("Weightage");
this.OnWeightageChanged();
}
}
}
[Column(Storage="_ExpectedTimeToAnswer", DbType="Time")]
public System.Nullable<System.TimeSpan> ExpectedTimeToAnswer
{
get
{
return this._ExpectedTimeToAnswer;
}
set
{
if ((this._ExpectedTimeToAnswer != value))
{
this.OnExpectedTimeToAnswerChanging(value);
this.SendPropertyChanging();
this._ExpectedTimeToAnswer = value;
this.SendPropertyChanged("ExpectedTimeToAnswer");
this.OnExpectedTimeToAnswerChanged();
}
}
}
[Association(Name="Question_Answer", Storage="_Answers", ThisKey="QuestionId", OtherKey="QuestionId")]
public EntitySet<Answer> Answers
{
get
{
return this._Answers;
}
set
{
this._Answers.Assign(value);
}
}
[Association(Name="Question_TestDetail", Storage="_TestDetails", ThisKey="QuestionId", OtherKey="QuestionId")]
public EntitySet<TestDetail> TestDetails
{
get
{
return this._TestDetails;
}
set
{
this._TestDetails.Assign(value);
}
}
[Association(Name="Chapter_Question", Storage="_Chapter", ThisKey="ChapterId", OtherKey="ChapterId", IsForeignKey=true)]
public Chapter Chapter
{
get
{
return this._Chapter.Entity;
}
set
{
Chapter previousValue = this._Chapter.Entity;
if (((previousValue != value)
|| (this._Chapter.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._Chapter.Entity = null;
previousValue.Questions.Remove(this);
}
this._Chapter.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._ChapterId = value.ChapterId;
}
else
{
this._ChapterId = default(Nullable<int>);
}
this.SendPropertyChanged("Chapter");
}
}
}
[Association(Name="QuestionType_Question", Storage="_QuestionType", ThisKey="QuestionTypeId", OtherKey="QuestionTypeId", IsForeignKey=true)]
public QuestionType QuestionType
{
get
{
return this._QuestionType.Entity;
}
set
{
QuestionType previousValue = this._QuestionType.Entity;
if (((previousValue != value)
|| (this._QuestionType.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._QuestionType.Entity = null;
previousValue.Questions.Remove(this);
}
this._QuestionType.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._QuestionTypeId = value.QuestionTypeId;
}
else
{
this._QuestionTypeId = default(Nullable<int>);
}
this.SendPropertyChanged("QuestionType");
}
}
}
[Association(Name="Topic_Question", Storage="_Topic", ThisKey="TopicId", OtherKey="TopicId", IsForeignKey=true)]
public Topic Topic
{
get
{
return this._Topic.Entity;
}
set
{
Topic previousValue = this._Topic.Entity;
if (((previousValue != value)
|| (this._Topic.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._Topic.Entity = null;
previousValue.Questions.Remove(this);
}
this._Topic.Entity = value;
if ((value != null))
{
value.Questions.Add(this);
this._TopicId = value.TopicId;
}
else
{
this._TopicId = default(Nullable<int>);
}
this.SendPropertyChanged("Topic");
}
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
private void attach_Answers(Answer entity)
{
this.SendPropertyChanging();
entity.Question = this;
}
private void detach_Answers(Answer entity)
{
this.SendPropertyChanging();
entity.Question = null;
}
private void attach_TestDetails(TestDetail entity)
{
this.SendPropertyChanging();
entity.Question = this;
}
private void detach_TestDetails(TestDetail entity)
{
this.SendPropertyChanging();
entity.Question = null;
}
}