System.ServiceModel 4.0.0.0 System.Enum The default value is . Indicates the formatter that is used to serialize objects that are sent as the body of an MSMQ message. Field 4.0.0.0 System.ServiceModel.MsmqIntegration.MsmqMessageSerializationFormat The ActiveX formatter is used to serialize the object. Field 4.0.0.0 System.ServiceModel.MsmqIntegration.MsmqMessageSerializationFormat The is used to serialize the object. Field 4.0.0.0 System.ServiceModel.MsmqIntegration.MsmqMessageSerializationFormat Serializes the object to an array of bytes. Field 4.0.0.0 System.ServiceModel.MsmqIntegration.MsmqMessageSerializationFormat Serializes the object to a stream. Field 4.0.0.0 System.ServiceModel.MsmqIntegration.MsmqMessageSerializationFormat is used to serialize the object.