How to add a carriage return/line feed to an pdf document

I have a existing pdf document with a bunch of textboxes on it. I'm populating each textbox and calling the Flatten() method. When I view the pdf file the line feeds are not present. Here is the code I'm currently using.

String fieldValue = "This is on first line \n this on the second line";
Document pdfDocument = new Document(path);
Form pdfForm = pdfDocument.Form;
TextBoxField field = pdfForm[fieldName] as TextBoxField;
field.Value = fieldValue;
pdfDocument.Flatten();

I've looked at the replacable symbols help page but I believe that's for xml processing when creating brand new pdf documents. I've tried adding just a \n and \r which doesn't work. Tried using the Environment.NewLine doesn't work.

Could you please send me a code sample that accomplishes a carriage return\line feed with an existing document. Is this even possible or perhaps a limitation with the current release or pdf itself? Thanks.

Any ideas?

Hi,

Sorry for replying you late.

We are working over this query and will get back to you soon. We apologize for the delay and inconvenience.