Use specified Unicode character value.
using System; using System.Xml; public class Sample { public static void Main() { XmlTextWriter writer = null; try { writer = new XmlTextWriter (Console.Out); writer.WriteStartElement("address"); writer.WriteString("someone"); writer.WriteCharEntity('@'); writer.WriteString("example"); writer.WriteCharEntity('.'); writer.WriteString("com"); writer.WriteEndElement(); } finally { if (writer != null) writer.Close(); } } }