Windows Phone - How can i post the data(register) including image?

        Dim url As String = "https://www.thaicreate.com/wp/img.jpg"
        Dim bm As BitmapImage = New BitmapImage(New Uri(url, UriKind.Absolute))
        AddHandler bm.DownloadProgress, AddressOf Me.bitmapImage_DownloadProgress
        Image1.Source = bm