HtmlAgilityPack - getting error when looping through nodes. Doesn't make sense

I'm trying to get all nodes below but I am getting an error message of:

Overload resolution failed because no accessible 'GetAttributeValue' accepts this number of arguments.

Code:

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Dim nodes As HtmlNodeCollection = docNode.SelectNodes("//input | //select | //textarea")

For Each node As HtmlNode In nodes

Dim id As String = node.GetAttributeValue("id")

Next

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Any ideas on why I am getting this error message? Thanks

It makes perfect sense and it means exactly what it says. The GetAttributeValue method is overloaded. It has three overloads and all three of them have two parameters, so you can't call it and pass a single argument. Intellisense would have told you what parameters the method had when you wrote the code so you should pay attention to those informational messages.

Ahh...i see..cool thanks bro!....here is my code.

Code:

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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim doc As New HtmlDocument()
        doc.LoadHtml("http://www.shaggybevo.com/board/register.php")
        Dim docNode As HtmlNode = doc.DocumentNode
        Dim nodes As HtmlNodeCollection = docNode.SelectNodes("//input")
        'SelectNodes takes a XPath expression
        For Each node As HtmlNode In nodes
            Dim id As String = node.GetAttributeValue("id", "value")
            ' Fetch id of HTML element
            Dim name As String = node.GetAttributeValue("name", "value")
            ' Fetch parameter name (GET/POST)
            ' Fetch type of input element
            ' Do your processing now
           
            Form2.RichTextBox1.Text = id.ToString & name.ToString


        Next




    End Sub

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I am now getting a new error of NullReferenceException was unhandled

Which line is the exception thrown on? What reference on that line is null?