ASP.NET/VB: JavaScriptSerializer - Avoiding Errors When JSON Empty

This works:

Imports System.Web.Script.Serialization
Public Class JSONstuff
    Inherits System.Web.UI.Page
    Dim obj As ResultRows
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim data As String = "{""total_rows"":427,""offset"":0,""rows"":[ {""id"":""123xyz""} ]}"
        Dim jsd As New JavaScriptSerializer
        obj = jsd.Deserialize(Of ResultRows)(data)
        Response.Write("id: " & obj.rows(0).id)
    End Sub
End Class

Public Class ResultRows
    Public rows() As ResultRow
End Class

Public Class ResultRow
    Public id As String
End Class

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But this returns an error:

Server Error in '/' Application.
Index was outside the bounds of the array.

Imports System.Web.Script.Serialization
Public Class JSONstuff
    Inherits System.Web.UI.Page
    Dim obj As ResultRows
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim data As String = "{""total_rows"":427,""offset"":0,""rows"":[]}"
        Dim jsd As New JavaScriptSerializer
        obj = jsd.Deserialize(Of ResultRows)(data)
        Response.Write("id: " & obj.rows(0).id)
    End Sub
End Class

Public Class ResultRows
    Public rows() As ResultRow
End Class

Public Class ResultRow
    Public id As String
End Class

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Instead of returning an error, how can I get it to return an empty value for the id?