ListBOX multiColumn. EASY problem.

Ok.   I write some lines to a file.

Then when i try to get them displayed in a listBOX........

I got them but on a Single-LINE[Row].

What property shall i change to get that text displayed on more Lines

 and not on a      ...Long  Long single Row ??

Here is some code I wrote :

DataSet DES=new DataSet();

XmlTextReader XRR=new XmlTextReader("D:\\BOTOLA_MyDocument_Projects\\My Documents\\Visual Studio 2005\\Projects\\cs_XML_World\\cs_XPATH_preCOMPILATION\\JO_Co.xml");

StringWriter SW=new StringWriter();