C# Azure服务总线，包含具有抽象正文的消息

我正在使用Azure主题和订阅作为消息总线。但是当我执行message.GetBody（）时，我遇到了一个序列化异常。我想要实现的是，有一个订阅服务器读取BaseEvent类型的所有事件，并且每个事件都有自己的订阅服务器。但是当我尝试序列化主体（BaseEvent）时，它失败了。那么，如何序列化主体以获取UserEvent和TeamEvent呢？我的代码如下所示：

public abstract class BaseEvent
{
    public long ActivityId { get; set; }
}

public class UserEvent
{
    public string Name { get; set; }
}

public class TeamEvent
{
    public string Name { get; set; }
}

public async Task HandleAsync(BaseEvent request)
{
     var message = new BrokeredMessage(request)
     {
         CorrelationId = request.Id.ToString()
     };

     await topicClient.SendAsync(message);
     await topicClient.CloseAsync();
}

BrokeredMessage message;
while ((message = client.Receive(new TimeSpan(0, 0, 5))) != null)
{
    models.Add(message.GetBody<BaseEvent>()); // THIS FAILS SerlizationException
    message.Complete();
}

我将它们添加到消息总线中，如下所示：

public abstract class BaseEvent
{
    public long ActivityId { get; set; }
}

public class UserEvent
{
    public string Name { get; set; }
}

public class TeamEvent
{
    public string Name { get; set; }
}

public async Task HandleAsync(BaseEvent request)
{
     var message = new BrokeredMessage(request)
     {
         CorrelationId = request.Id.ToString()
     };

     await topicClient.SendAsync(message);
     await topicClient.CloseAsync();
}

BrokeredMessage message;
while ((message = client.Receive(new TimeSpan(0, 0, 5))) != null)
{
    models.Add(message.GetBody<BaseEvent>()); // THIS FAILS SerlizationException
    message.Complete();
}

当我在车上看书时，我喜欢这样：

public abstract class BaseEvent
{
    public long ActivityId { get; set; }
}

public class UserEvent
{
    public string Name { get; set; }
}

public class TeamEvent
{
    public string Name { get; set; }
}

public async Task HandleAsync(BaseEvent request)
{
     var message = new BrokeredMessage(request)
     {
         CorrelationId = request.Id.ToString()
     };

     await topicClient.SendAsync(message);
     await topicClient.CloseAsync();
}

BrokeredMessage message;
while ((message = client.Receive(new TimeSpan(0, 0, 5))) != null)
{
    models.Add(message.GetBody<BaseEvent>()); // THIS FAILS SerlizationException
    message.Complete();
}

代理消息；
while（（message=client.Receive（new TimeSpan（0,0,5）））！=null）
{
models.Add（message.GetBody（））；//此操作失败SerlizationException
message.Complete（）；
}

作为声明：

public BrokeredMessage(
    Object serializableObject
)

---

它使用带有二进制XmlDictionaryWriter的DataContractSerializer从给定对象初始化BrokeredMessage类的新实例。因此，类BaseEvent必须支持DataContractSerializer。至于怎么做，请参考

我已经试过了，但还是出现了同样的错误。并将KnownType属性添加到BaseEvent。