asp.net, space conversion in a Web text box

In C #, Textbox-multiline is used to directly swap lines when displayed.

The newline is indicated by "\r\t" and the Unicode code for \ r, \ n is 13, 10, and the Unicode code for the space is 32.
Line Feed Conversion Method:
(1) String Newline=this.txtbody.text.replace ("\x0d\x0a", "<br/>");
(2) string Newline=this.txtbody.text.replace ("\ r \ n", "<br/>");
(3) String newline = This.txtbody.Text.Replace (Char.convertfromutf32 (a) +char.convertfromutf32 (a), "<br/>");


Space Conversion Method:
(1) String Newline=this.txtbody.text.replace ("\x20", "&nbsp;");
(2) string Newline=this.txtbody.text.replace (CHAR.CONVERTFROMUTF32), "&nbsp;");