<< You should use an HTML textarea instead of a multiline textbox if you want breaks between lines. >>
From what I can gather, this is not a different solution since multiline textbox is represented by HTML textarea already when presented to the browser. Line breaks are represented by /r/n character combination which often have to be replaced by <br> prior to being displayed. I wish the powers that be can one day remove this issue since so many people are having problems with it.