WCF: MessageBodyMember Ignore Order

Question

I'm using MessageContracts to define my web method signatures and return types. Such as:

<MessageContract(WrapperName:="get")> _
Public Class GetRequest
    Inherits BaseAuthenticatedRequest

    Protected _typeName As cEnum.eType
    Protected _id As Integer

    <MessageBodyMember()> _
    Public Property TypeName() As cEnum.eType
    ...

    <MessageBodyMember()> _
    Public Property Id() As Integer
    ...
End Class

When these parameters are ordered in the WSDL they're ordered alphabetically, which isn't a huge problem. However, it appears as though I'm required to submit my soap request with the elements in that order, or the request deserializer loses my data (e.g. no TypeName, or no Id comes through).

Is there a way for me to tell the MessageContract / MessageBodyMembers that order does not need to matter?