MulticastTextWriter

 using  System;
 using  System.Collections.Generic;
 using  System.IO;
 using  System.Text;

 namespace  BA.Core.IO {
     /// <summary>
     /// Text Writer that writes to one or move text writers; used in Tracing;
     /// </summary>
     public  class  MulticastTextWriter :NotificationTextWriter  {

         readonly  List <TextWriter > _textWriters = null ;
         /// <summary>
         /// Gets or Sets wether to flush writers after each write
         /// </summary>
         public  bool  AutoFlush { get ; set ; }

         public  MulticastTextWriter() {
             _textWriters = new  List <TextWriter >();
         }

         public  MulticastTextWriter(params  TextWriter [] textWriters) {
             _textWriters = new  List <TextWriter >(textWriters);
         }
         public  MulticastTextWriter(TextNotificationHandler  notificationFunc,params  TextWriter [] textWriters)
             : this (textWriters) {
             TextNotification += notificationFunc;
         }
         public  TextWriter [] GetWriters() {
             lock (_textWriters) {
                 return  _textWriters.ToArray();
             }
         }
         protected  override  void  Dispose(bool  disposing) {
             lock (_textWriters) {
                 foreach (TextWriter  writer in  _textWriters)
                     writer.Dispose();
             }
             base .Dispose(disposing);
         }

         public  void  Add(TextWriter  textWriter) {
             lock (_textWriters) {
                 _textWriters.Add(textWriter);
             }
         }

         public  bool  Remove(TextWriter  textWriter) {
             lock (_textWriters) {
                 return  _textWriters.Remove(textWriter);
             }
         }
         public  override  void  Write(char [] buffer,int  index,int  count) {
             TextWriter [] writers = GetWriters();
             foreach (TextWriter  tw in  writers) {
                 tw.Write(buffer,index,count);
             }

             base .Write(buffer,index,count);

             if (AutoFlush)
                 Flush();
         }
         public  override  void  Flush() {
             TextWriter [] writers = GetWriters();
             foreach (TextWriter  tw in  writers) {
                 tw.Flush();
             }
         }
         public  override  void  Close() {
             TextWriter [] writers = GetWriters();
             foreach (TextWriter  tw in  writers) {
                 tw.Close();
             }
         }
         public  override  Encoding  Encoding {
             get  {
                 return  base .Encoding;
             }
         }
     }
 }