How to get textbox.text in a TableCell?
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How can I get the text in a TextBox within a TableCell?

      protected void MailReturnMessage()
      {
  
    String textBoxText;
        TableRow trNew = new TableRow();
        TableCell mailReturnDescription = new TableCell();
        mailReturnDescription.ColumnSpan = 12;
        mailReturnDescription.Text = "<b>Beskriv hvorfor medarbejderen skal lave sin timeseddel om:</b>" + "<br />";

        trNew.Cells.Add(mailReturnDescription);
        Table1.Rows.Add(trNew);

        TableRow trNew1 = new TableRow();
        TableCell textBoxCell = new TableCell();
        TableCell mailSend = new TableCell();

        LinkButton linkButtonMailSend = new LinkButton();
        TextBox tbMailReturnDescription = new TextBox();
        
        tbMailReturnDescription.ID = "tbMailReturnDescription1";
        tbMailReturnDescription.Width = 600;
        tbMailReturnDescription.Height = 50;
        tbMailReturnDescription.TextMode = TextBoxMode.MultiLine;
        tbMailReturnDescription.Wrap = true;
        textBoxText = tbMailReturnDescription1.Text;
        Label2.Text = textBoxText;

        linkButtonMailSend.CommandName = "SendEmail";
        linkButtonMailSend.CommandArgument = textBoxText;


        linkButtonMailSend.Click += new EventHandler(linkButtonMailSend_Click);
        linkButtonMailSend.Text = "<b>Send mail til medarbejder</b>";

        mailSend.Controls.Add(linkButtonMailSend);

        textBoxCell.Controls.Add(tbMailReturnDescription);
        textBoxCell.ColumnSpan = 7;
        mailSend.ColumnSpan = 4;
        mailSend.VerticalAlign = VerticalAlign.Bottom;
        
        trNew1.Cells.Add(textBoxCell);
        trNew1.Cells.Add(mailSend);
        Table1.Rows.Add(trNew1);

    }

The result of Labe2.Text is emty/nothing. Why?

If I treid to do this:

    tbMailReturnDescription.Text = "Test word";
    textBoxText = tbMailReturnDescription.Text;
    Label2.Text = textBoxText;

I only get text: Test word in label2. I do not get any text I have write in in text. It is as 
    tbMailReturnDescription.ID = "tbMailReturnDescription1"; 
not seems to work. I can get a error message: the name 'tbMailReturnDescription1' does not exist in the current context