Entity Framework 4.1 - 윈도우 폰 7에서의 CodeFirst 순환 참조 문제

이전 글들에서 CodeFirst의 순환 참조에 대한 문제를 이야기했는데요.

Entity Framework 4.1 - CodeFirst 개체의 직렬화 시 순환 참조 해결하는 방법
; https://www.sysnet.pe.kr/2/0/1086

Entity Framework 4.1 - CodeFirst 개체의 직렬화 시 순환 참조 해결하는 방법 - 두 번째 이야기
; https://www.sysnet.pe.kr/2/0/1087

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body>
        <GetMyEntitiesResponse xmlns="http://tempuri.org/">
            <GetMyEntitiesResult z:Id="1" z:Size="16" 
                xmlns:a="http://schemas.datacontract.org/2004/07/" 
                xmlns:i="http://www.w3.org/2001/XMLSchema-instance" 
                xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/">
                <a:MyEntity z:Id="2">
                    <a:Description z:Id="3">World!</a:Description>
                    <a:Id>1</a:Id>
                    <a:SubEntities z:Id="4" z:Size="2">
                        <a:SubEntity z:Id="5">
                            <a:Description z:Id="6">SubEntity #1</a:Description>
                            <a:Id>1</a:Id>
                            <a:MyEntity z:Ref="2" i:nil="true"/>
                            <a:MyEntityId>1</a:MyEntityId>
                        </a:SubEntity>
                    </a:SubEntities>
                </a:MyEntity>
            </GetMyEntitiesResult>
        </GetMyEntitiesResponse>
    </s:Body>
</s:Envelope>

public MyEntity [] GetMyEntities()
{
    using (DBContext db = new DBContext())
    {
        var items = from record in db.MyEntities.Include("SubEntities")
                    select record;

        foreach (var item in items)
        {
            foreach (var subEntity in item.SubEntities)
            {
                subEntity.MyEntity = null;
            }
        }

        return items.ToArray();
    }
}