DepartmentInfoTessaID - свойство

public Guid? TessaID { get; set; }

Public Property TessaID As Guid?
	Get
	Set

public:
property Nullable<Guid> TessaID {
	Nullable<Guid> get ();
	void set (Nullable<Guid> value);
}

member TessaID : Nullable<Guid> with get, set