DataContractJsonSerializer include object name in JSON object - json

Question

I'm trying to serialize a JSON object so I can send it to a web service. I'm using this asp.net vb code:
Dim ser As DataContractJsonSerializer = New DataContractJsonSerializer(postData.GetType())
Dim MS As MemoryStream = New MemoryStream()
ser.WriteObject(MS, postData)
json = Encoding.UTF8.GetString(MS.ToArray())
which produces this JSON:
{"guid":"10049cf5-a622-4aa6-a1d5-58022c4e2a19"}
But what I NEED...is this JSON:
{"registerRequest": {"guid":"10049cf5-a622-4aa6-a1d5-58022c4e2a19"}}
here is the class definition for the object I'm trying to send:
Partial Public Class registerRequest
Private Property _guid As String
Public Property guid As String
Get
Return _guid
End Get
Set(value As String)
_guid = value
End Set
End Property
Sub New()
End Sub
End Class
How do I get the name of the class to appear in the JSON object as described above?

Answer 1

Add datacontractjsonserializersettings to your constructor on DataContractDataSerializer
http://msdn.microsoft.com/en-us/library/system.runtime.serialization.json.datacontractjsonserializersettings.emittypeinformation.aspx
Try using rootname setting in the constructor instead.
http://msdn.microsoft.com/en-us/library/system.runtime.serialization.json.datacontractjsonserializersettings.rootname.aspx

Answer 2

OK, to match the format I Just created a wrapper class with a "registerRequest" object inside of it. Kind of a work around, but it works!
Partial Public Class SerializedRegisterRequest
Private Property _registerRequest As registerRequest
Public Property registerRequest As registerRequest
Get
Return _registerRequest
End Get
Set(value As registerRequest)
_registerRequest = value
End Set
End Property
Sub New()
End Sub
End Class
Partial Public Class registerRequest
Private Property _guid As String
Public Property guid As String
Get
Return _guid
End Get
Set(value As String)
_guid = value
End Set
End Property
Sub New()
End Sub
End Class