After I create the text file using this code.
 

    Using zip = New ZipFile()

 

        For Each row As GridDataItem In RadGridDocs.MasterTableView.Items

 

            Dim clientSelectColumn As CheckBox = DirectCast(row("ClientSelectColumn").Controls(0), CheckBox)

 

            Dim chkBox = clientSelectColumn.Checked

 

            If chkBox = "True" Then

 

                Dim txtDocument As TextBox = row.FindControl("txtDocumentFileName")
                Dim fileName As String = txtDocument.Text

 

                Dim txtDocumentPath As TextBox = row.FindControl("txtDocumentPath")
                Dim documentPath As String = txtDocumentPath.Text

 

                Dim fullpath As String = Server.MapPath("~") + "\" + documentPath + fileName

 

                fullpath = Replace(fullpath, "/", "\")

 

                fullpath = Replace(fullpath, "\", "\\")

 

                'Code to Zip a Folder.

 

                zip.AddFile(fullpath)

 

            End If

 

        Next

 

        zip.Save(Response.OutputStream)

 

    End Using

 

 
I am trying to send this out via a asp.net application using .NET 3.5. I keep getting the error "Cannot open file: it does not appear to be a valid archive."
 
Are there any ideas?