Try something like this:
this.rawValue = xfa.resolveNode("#subform[1].CAOName").rawValue + "\n" + xfa.resolveNode("#subform[1].Addr1").rawValue + "\n"; if ((xfa.resolveNode("#subform[1].Addr2").rawValue) != null) { this.rawValue = this.rawValue + xfa.resolveNode("#subform[1].Addr2").rawValue; } else { this.rawValue = this.rawValue + xfa.resolveNode("#subform[1].City").rawValue + xfa.resolveNode("#subform[1].State").rawValue + xfa.resolveNode("#subform[1].Replyzip").rawValue }