showdialog is not member of system.Array

I am trying to learn VB by using APress - Beginning Visual Basic 2005 Express edition by Peter Wright.

I have an error: showdialog is not member of system.Array.

As a complete novice I do not know what is causing this error and how to get rid of it.

Here is the code:

Public Class Form1

    Private Sub getNameButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles getNameButton.Click
        Dim nameDialog As dialog()
        If nameDialog.ShowDialog = Windows.Forms.DialogResult.OK Then
            MessageBox.Show("This .Net stuff could really catch on!")
        End If
    End Sub
End Class