问带引用静态字段的.NET序列化问题

EN

#include "stdafx.h"

using namespace System;
using namespace System::IO;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Binary;

[Serializable]
ref class Department {
    static Department(){ accounts = gcnew Department(L"Accounts"); }
public:
    static Department ^accounts;
    // similarly other departments come here...

    String ^name;
    Department(String ^name) : name(name) { }
};

[Serializable]
ref class Employee {
public:
    String ^name;
    Department ^department;

    Employee(String ^name, Department ^department) : name(name),
        department(department) { }

};

int main(array<System::String ^> ^args)
{
    Employee ^jack;
    IFormatter ^formatter = gcnew BinaryFormatter();

    String ^option = Console::ReadLine();
    if(option == L"read"){
        Stream ^stream = gcnew FileStream(L"dingdong.bin", FileMode::Open,
            FileAccess::Read, FileShare::Read);
        jack = (Employee^) formatter->Deserialize(stream);

        if(jack->department != Department::accounts)
            Console::WriteLine(L"Different objects");
        else
            Console::WriteLine(L"The same object");
        stream->Close();
        Console::ReadLine();
    }
    else {
        jack = gcnew Employee(L"Jack", Department::accounts);
        Stream ^stream = gcnew FileStream(L"dingdong.bin", FileMode::Create,
            FileAccess::Write, FileShare::None);
        formatter->Serialize(stream, jack);
        stream->Close();
    }

    return 0;
}