Visualizzare il codice html di una pagina web con VB.NET

Function getHtmlCode(ByVal url As String) As String
Dim WebRequest As Net.HttpWebRequest
Dim WebResponse As Net.WebResponse
Dim stream As IO.Stream
Dim streamReader As IO.StreamReader
Try
        WebRequest = Net.WebRequest.Create(url)
        WebRequest.Timeout = 10000
        WebResponse = WebRequest.GetResponse
        stream = WebResponse .GetResponseStream
        streamReader = New IO.StreamReader(stream)
        Return streamReader.ReadToEnd
Catch ex As Exception
            MsgBox(ex.ToString)
End Try
End Function