c＃wcf ServiceKnownType未在客户端服务引用上传播

Question

我有一个返回数组Dictionary []的服务。现在，我使用该服务返回MongoDb查询的结果和行的ID（ObjectId）。然后它抛出UnknownType的异常：

System.Runtime.Serialization.SerializationException: Error in line 1 position 268. Element 'http://tempuri.org/:GetDataResult' contains data from a type that maps to the name 'http://schemas.datacontract.org/2004/07/MongoDB.Bson:ObjectId'. The deserializer has no knowledge of any type that maps to this name. Consider using a DataContractResolver if you are using DataContractSerializer or add the type corresponding to 'ObjectId' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to the serializer.

我已将ServiceKnownType属性放在OperationContract上，但它没有用。如果我将ServiceKnownType属性直接放在“Reference.cs”上生成它可以工作，但我不想手动修改生成的ServiceReference，有没有办法在客户端ServiceReference上自动传播“ServiceKnownType”？

（我正在使用VS2010和Framework 4.0）

要测试的最小代码：

[SERVER]

[ServiceContract]
public interface IService1
{

    [OperationContract]
    [ServiceKnownType(typeof(MongoDB.Bson.ObjectId))]
    List<Dictionary<string, object>> GetData(int value);

}

[CLIENT]

[TestMethod]
public void TestMethod1()
{
    var client = new ServiceReference1.Service1Client();
    var data = client.GetData(1);
    Assert.IsNotNull(data);
}