iText7内联错误

Question

我再次尝试iText7并重新启动＆＃34; Hello World＆＃34;我无法开展工作的例子。这是我的代码：

Imports iText.Kernel.Pdf
Imports iText.Layout
Private Sub Print(sender As Object, e As RoutedEventArgs) Handles btnPrint.Click
    Dim dest As String = "f:\Test.pdf"
    Dim writer As PdfWriter = New PdfWriter(dest)
    Dim pdf As PdfDocument = New PdfDocument(writer)
    Dim doc As Document = New Document(pdf)
    doc.Add(New Paragraph("Hello World"))
    doc.Close()
End Sub

我得到的错误是

Value of type 'String' cannot be converted to 'Inline'.

然而，文档声明构造函数采用字符串。有什么问题？