dataclasses.designer.cs

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					throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
				}
				this.OnClassIDChanging(value);
				this.SendPropertyChanging();
				this._ClassID = value;
				this.SendPropertyChanged("ClassID");
				this.OnClassIDChanged();
			}
		}
	}
	
	[Column(Storage="_Name", DbType="VarChar(200)")]
	public string Name
	{
		get
		{
			return this._Name;
		}
		set
		{
			if ((this._Name != value))
			{
				this.OnNameChanging(value);
				this.SendPropertyChanging();
				this._Name = value;
				this.SendPropertyChanged("Name");
				this.OnNameChanged();
			}
		}
	}
	
	[Column(Storage="_Age", DbType="Int")]
	public System.Nullable<int> Age
	{
		get
		{
			return this._Age;
		}
		set
		{
			if ((this._Age != value))
			{
				this.OnAgeChanging(value);
				this.SendPropertyChanging();
				this._Age = value;
				this.SendPropertyChanged("Age");
				this.OnAgeChanged();
			}
		}
	}
	
	[Column(Storage="_Sex", DbType="Int")]
	public System.Nullable<int> Sex
	{
		get
		{
			return this._Sex;
		}
		set
		{
			if ((this._Sex != value))
			{
				this.OnSexChanging(value);
				this.SendPropertyChanging();
				this._Sex = value;
				this.SendPropertyChanged("Sex");
				this.OnSexChanged();
			}
		}
	}
	
	[Column(Storage="_Address", DbType="VarChar(200)")]
	public string Address
	{
		get
		{
			return this._Address;
		}
		set
		{
			if ((this._Address != value))
			{
				this.OnAddressChanging(value);
				this.SendPropertyChanging();
				this._Address = value;
				this.SendPropertyChanged("Address");
				this.OnAddressChanged();
			}
		}
	}
	
	[Column(Storage="_Phone", DbType="VarChar(200)")]
	public string Phone
	{
		get
		{
			return this._Phone;
		}
		set
		{
			if ((this._Phone != value))
			{
				this.OnPhoneChanging(value);
				this.SendPropertyChanging();
				this._Phone = value;
				this.SendPropertyChanged("Phone");
				this.OnPhoneChanged();
			}
		}
	}
	
	[Column(Storage="_Birthday", DbType="DateTime")]
	public System.Nullable<System.DateTime> Birthday
	{
		get
		{
			return this._Birthday;
		}
		set
		{
			if ((this._Birthday != value))
			{
				this.OnBirthdayChanging(value);
				this.SendPropertyChanging();
				this._Birthday = value;
				this.SendPropertyChanged("Birthday");
				this.OnBirthdayChanged();
			}
		}
	}
	
	[Column(Storage="_EntranceDate", DbType="DateTime")]
	public System.Nullable<System.DateTime> EntranceDate
	{
		get
		{
			return this._EntranceDate;
		}
		set
		{
			if ((this._EntranceDate != value))
			{
				this.OnEntranceDateChanging(value);
				this.SendPropertyChanging();
				this._EntranceDate = value;
				this.SendPropertyChanged("EntranceDate");
				this.OnEntranceDateChanged();
			}
		}
	}
	
	[Column(Storage="_Nationality", DbType="VarChar(200)")]
	public string Nationality
	{
		get
		{
			return this._Nationality;
		}
		set
		{
			if ((this._Nationality != value))
			{
				this.OnNationalityChanging(value);
				this.SendPropertyChanging();
				this._Nationality = value;
				this.SendPropertyChanged("Nationality");
				this.OnNationalityChanged();
			}
		}
	}
	
	[Column(Storage="_Political", DbType="VarChar(200)")]
	public string Political
	{
		get
		{
			return this._Political;
		}
		set
		{
			if ((this._Political != value))
			{
				this.OnPoliticalChanging(value);
				this.SendPropertyChanging();
				this._Political = value;
				this.SendPropertyChanged("Political");
				this.OnPoliticalChanged();
			}
		}
	}
	
	[Column(Storage="_NativePlace", DbType="VarChar(200)")]
	public string NativePlace
	{
		get
		{
			return this._NativePlace;
		}
		set
		{
			if ((this._NativePlace != value))
			{
				this.OnNativePlaceChanging(value);
				this.SendPropertyChanging();
				this._NativePlace = value;
				this.SendPropertyChanged("NativePlace");
				this.OnNativePlaceChanged();
			}
		}
	}
	
	[Column(Storage="_IdentityCard", DbType="VarChar(200)")]
	public string IdentityCard
	{
		get
		{
			return this._IdentityCard;
		}
		set
		{
			if ((this._IdentityCard != value))
			{
				this.OnIdentityCardChanging(value);
				this.SendPropertyChanging();
				this._IdentityCard = value;
				this.SendPropertyChanged("IdentityCard");
				this.OnIdentityCardChanged();
			}
		}
	}
	
	[Column(Storage="_Marital", DbType="Int")]
	public System.Nullable<int> Marital
	{
		get
		{
			return this._Marital;
		}
		set
		{
			if ((this._Marital != value))
			{
				this.OnMaritalChanging(value);
				this.SendPropertyChanging();
				this._Marital = value;
				this.SendPropertyChanged("Marital");
				this.OnMaritalChanged();
			}
		}
	}
	
	[Column(Storage="_Hukou", DbType="VarChar(200)")]
	public string Hukou
	{
		get
		{
			return this._Hukou;
		}
		set
		{
			if ((this._Hukou != value))
			{
				this.OnHukouChanging(value);
				this.SendPropertyChanging();
				this._Hukou = value;
				this.SendPropertyChanged("Hukou");
				this.OnHukouChanged();
			}
		}
	}
	
	[Column(Storage="_State", DbType="Int")]
	public System.Nullable<int> State
	{
		get
		{
			return this._State;
		}
		set
		{
			if ((this._State != value))
			{
				this.OnStateChanging(value);
				this.SendPropertyChanging();
				this._State = value;
				this.SendPropertyChanged("State");
				this.OnStateChanged();
			}
		}
	}
	
	[Column(Storage="_Desn", DbType="Text", UpdateCheck=UpdateCheck.Never)]
	public string Desn
	{
		get
		{
			return this._Desn;
		}
		set
		{
			if ((this._Desn != value))
			{
				this.OnDesnChanging(value);
				this.SendPropertyChanging();
				this._Desn = value;
				this.SendPropertyChanged("Desn");
				this.OnDesnChanged();
			}
		}
	}
	
	[Association(Name="Student_Score", Storage="_Scores", OtherKey="StudentID")]
	public EntitySet<Score> Scores
	{
		get
		{
			return this._Scores;
		}
		set
		{
			this._Scores.Assign(value);
		}
	}
	
	[Association(Name="Class_Student", Storage="_Class", ThisKey="ClassID", IsForeignKey=true)]
	public Class Class
	{
		get
		{
			return this._Class.Entity;
		}
		set
		{
			Class previousValue = this._Class.Entity;
			if (((previousValue != value) 
						|| (this._Class.HasLoadedOrAssignedValue == false)))
			{
				this.SendPropertyChanging();
				if ((previousValue != null))
				{
					this._Class.Entity = null;
					previousValue.Students.Remove(this);
				}
				this._Class.Entity = value;
				if ((value != null))
				{
					value.Students.Add(this);
					this._ClassID = value.ClassID;
				}
				else
				{
					this._ClassID = default(Nullable<int>);
				}
				this.SendPropertyChanged("Class");
			}
		}
	}
	
	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_Scores(Score entity)
	{
		this.SendPropertyChanging();
		entity.Student = this;
	}
	
	private void detach_Scores(Score entity)
	{
		this.SendPropertyChanging();
		entity.Student = null;
	}
}

[Table(Name="dbo.Teacher")]
public partial class Teacher : INotifyPropertyChanging, INotifyPropertyChanged
{
	
	private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
	
	private int _TeacherID;
	
	private string _Name;
	
	private System.Nullable<int> _Age;
	
	private string _Address;
	
	private string _Phone;
	
	private System.Nullable<System.DateTime> _Birthday;
	
	private System.Nullable<System.DateTime> _HireDate;
	
	private System.Nullable<int> _DepartmentID;
	
	private EntitySet<Class> _Classes;
	
	private EntitySet<Course> _Courses;
	
	private EntityRef<Department> _Department;
	
    #region Extensibility Method Definitions
    partial void OnLoaded();
    partial void OnValidate(System.Data.Linq.ChangeAction action);
    partial void OnCreated();
    partial void OnTeacherIDChanging(int value);
    partial void OnTeacherIDChanged();
    partial void OnNameChanging(string value);
    partial void OnNameChanged();
    partial void OnAgeChanging(System.Nullable<int> value);
    partial void OnAgeChanged();
    partial void OnAddressChanging(string value);
    partial void OnAddressChanged();
    partial void OnPhoneChanging(string value);
    partial void OnPhoneChanged();
    partial void OnBirthdayChanging(System.Nullable<System.DateTime> value);
    partial void OnBirthdayChanged();
    partial void OnHireDateChanging(System.Nullable<System.DateTime> value);
    partial void OnHireDateChanged();
    partial void OnDepartmentIDChanging(System.Nullable<int> value);
    partial void OnDepartmentIDChanged();
    #endregion
	
	public Teacher()
	{
		this._Classes = new EntitySet<Class>(new Action<Class>(this.attach_Classes), new Action<Class>(this.detach_Classes));
		this._Courses = new EntitySet<Course>(new Action<Course>(this.attach_Courses), new Action<Course>(this.detach_Courses));
		this._Department = default(EntityRef<Department>);
		OnCreated();
	}
	
	[Column(Storage="_TeacherID", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
	public int TeacherID
	{
		get
		{
			return this._TeacherID;
		}
		set
		{
			if ((this._TeacherID != value))
			{
				this.OnTeacherIDChanging(value);
				this.SendPropertyChanging();
				this._TeacherID = value;
				this.SendPropertyChanged("TeacherID");
				this.OnTeacherIDChanged();
			}
		}
	}
	
	[Column(Storage="_Name", DbType="VarChar(200)")]
	public string Name
	{
		get
		{
			return this._Name;
		}
		set
		{
			if ((this._Name != value))
			{
				this.OnNameChanging(value);
				this.SendPropertyChanging();
				this._Name = value;
				this.SendPropertyChanged("Name");
				this.OnNameChanged();
			}
		}
	}
	
	[Column(Storage="_Age", DbType="Int")]
	public System.Nullable<int> Age
	{
		get
		{
			return this._Age;
		}
		set
		{
			if ((this._Age != value))
			{
				this.OnAgeChanging(value);
				this.SendPropertyChanging();
				this._Age = value;
				this.SendPropertyChanged("Age");
				this.OnAgeChanged();
			}
		}
	}
	
	[Column(Storage="_Address", DbType="VarChar(200)")]
	public string Address
	{
		get
		{
			return this._Address;
		}
		set
		{
			if ((this._Address != value))
			{
				this.OnAddressChanging(value);
				this.SendPropertyChanging();
				this._Address = value;
				this.SendPropertyChanged("Address");
				this.OnAddressChanged();
			}
		}
	}
	
	[Column(Storage="_Phone", DbType="VarChar(200)")]
	public string Phone
	{
		get
		{
			return this._Phone;
		}
		set
		{
			if ((this._Phone != value))
			{
				this.OnPhoneChanging(value);
				this.SendPropertyChanging();
				this._Phone = value;
				this.SendPropertyChanged("Phone");
				this.OnPhoneChanged();
			}
		}
	}
	
	[Column(Storage="_Birthday", DbType="DateTime")]
	public System.Nullable<System.DateTime> Birthday
	{