Private Shared Sub RemoveAssembly(ByVal documentPath As String)
    Dim runtimeVersion As Integer = 0

    Try
        ' Make sure that this customization was created using the correct runtime.
        runtimeVersion = ServerDocument.GetCustomizationVersion(documentPath)
        If runtimeVersion <> 3 Then
            MessageBox.Show("This document does not have a Visual Studio Tools for Office " & _
                "customization, or it has a customization that was created with a version of " & _
                "the runtime that is incompatible with this version of the ServerDocument class.")
            Return
        End If

        ServerDocument.RemoveCustomization(documentPath)
        MessageBox.Show("The customization has been removed.")

    Catch ex As System.IO.FileNotFoundException
        System.Windows.Forms.MessageBox.Show("The specified document does not exist.")
    Catch ex As System.IO.IOException
        System.Windows.Forms.MessageBox.Show("The specified document is read-only.")
    Catch ex As UnknownCustomizationFileException
        System.Windows.Forms.MessageBox.Show("The specified document has a file " & _
            "extension that is not supported by Visual Studio Tools for Office.")
    Catch ex As InvalidOperationException
        System.Windows.Forms.MessageBox.Show("The customization could not be removed." & _
            vbLf & ex.Message)
    End Try
End Sub