XmlConvert.VerifyWhitespace
Imports System Imports System.Xml Public Class Sample Public Shared Sub Main() Dim writer5 As XmlTextWriter = New XmlTextWriter("outFile.xml", Nothing) Dim illegalWhiteSpaceChar As Char = "_" Try writer5.WriteStartElement("root") writer5.WriteStartElement("legalElement") writer5.WriteString("ValueText" + XmlConvert.VerifyWhitespace(" " + illegalWhiteSpaceChar)) writer5.WriteEndElement() writer5.WriteEndElement() writer5.Close() Catch e As XmlException Console.WriteLine(e.Message) writer5.Close() End Try End Sub End Class