Cannot query boardreader?

I am using VB.net and Webbrowser control(wbMain) to access website. I set the url to:

http://ift.tt/2iG0uwZ

Then check the value in wbMain.Document.DomDocument.Body.innerHTML, but find the value is:

    <div id="angular-content" style="height: 100%; min-height: 100%;">





        <app-root>



        </app-root>

    </div>

<script>

    localStorage.setItem('currentYear', 2016);

localStorage.setItem('noCheck', 'ok');

localStorage.removeItem('searchQuery');

localStorage.removeItem('searchParams');

localStorage.removeItem('currentUrl');

</script>

type="text/javascript">

src="styles.5f7f16a82a4f91544984.bundle.js"

type="text/javascript">

src="scripts.64dba058e16f4b72599d.bundle.js"

type="text/javascript">

src="main.3c0725bdf3863d8a267c.bundle.js" type="text/javascript">

Then I check wbMain.Document.DomDocument.Body.innerText and the its value

is:

localStorage.setItem('currentYear', 2016); localStorage.setItem('noCheck', 'ok'); 
localStorage.removeItem('searchQuery');

localStorage.removeItem('searchParams');

localStorage.removeItem('currentUrl'); 

None of them contain the actual search result. Why?

In my code, I have codes to wait until the web page is completely loaded, as follows:

        wbMain.Navigate(New System.Uri(strURL))
        LoadCompleted = False              ' set the global flag to False to indicate the page has not been loaded completedly
        Call WaitForNavigation2(wbMain)

and WaitForNavigation2 is:

' Wait for navigation to complete

Public Const conTimeOut As Integer = 3000
Public Sub WaitForNavigation2(ByRef wbMain As System.Windows.Forms.WebBrowser)
    Dim iTickCount As Integer

    iTickCount = GetTickCount()
    Do While (Not LoadCompleted)
        ' Sleep 10
        System.Windows.Forms.Application.DoEvents()

        ' Check for timeout
        If (GetTickCount() - iTickCount) \ 1000 > conTimeOut Then
            Exit Do
        End If
    Loop 
End Sub

and in the DocumentCompleted event of the web browser control wbMain, I will set the global flag LoadCompleted to True to indicate it is loaded completedly:

Private Sub wbMain_DocumentCompleted(ByVal eventSender As System.Object, ByVal eventArgs As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles wbMain.DocumentCompleted
    LoadCompleted = True

End Sub

Thanks