(Trying to use) DataContractJsonSerializer

I am trying to follow this example: http://msdn.microsoft.com/en-us/library/bb412179(v=vs.110).aspx

But I am just doing a simple desktop app; no WCF, no AJAX, no web anything.

My code is in VB.Net and I am getting a syntax error which I do not understand on this statement:

dim ser As New datacontractjsonserializer(typeof(JsonRow))

The help want me to add "Is" so that it would end like this ...(typeof(JsonRow)Is).  But that makes no sense to me and did not help.

I don't have much code yet.  Here it is:

Option Strict On
Option Explicit On
Option Infer Off

Imports System.Runtime.Serialization.Json
Imports System.Web.Script.Serialization  'needs reference for System.Web.Extensions (which is not in the Client profile)
Imports System.IO

Public Class Form1
dim ser As New datacontractjsonserializer(typeof(JsonRow))

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Dim jr As New JsonRow
        Dim stream1 As New MemoryStream(System.Text.Encoding.ASCII.GetBytes("{""somenums"": ""1"",""someDate"": ""1.1.2014"",""viewdata"": ""1119958""," & _"""visitdata"": ""152452"",""uniquedata"": ""125873""}".ToCharArray))

        stream1.Position = 0
        Dim sr As New StreamReader(stream1)
        jr = DirectCast(

    End Sub

End Class

<Serializable()> _
Public Class JsonRow
    Public somenums As String
    Public someDate As String
    Public viewdata As String
    Public visitdata As String
    Public uniquedata As String

    Sub New()  'we need a parameter-less constructor to make it serializable
    End Sub
End Class

I'd appreciate it if anyone can help me with this.

Thanks,  Bob