static void Example()
{
  string zipFilePath = @"D:\RealTimeZipExamples\MyZipFile.zip";

  // Create a stream for a new zip file
  using( FileStream zipFileStream = new FileStream( zipFilePath, FileMode.Create, FileAccess.Write, FileShare.None ) )
  {
    // Create a ZipWriter instance that will write into a stream that has been prepared
    using( ZipWriter writer = new ZipWriter( zipFileStream ) )
    {
      ZipItemLocalHeader header = new ZipItemLocalHeader();

      header.FileName = "File1.xml";
      writer.WriteItemLocalHeader( header );

      // Instead of using WriteItemData(), we will get a writing stream to the item's data 
      using( Stream itemStream = writer.GetItemDataStream() )
      {
        // The stream will be 'closed' automatically by the 'using' statement. This will not 
        // close the zip file or the current item. It will only indicate to the stream 
        // that its work is done and clear its resources. 

        // Having a stream object handy here makes using a XmlWriter very easy 
        using( XmlWriter xml = XmlWriter.Create( itemStream ) )
        {
          xml.WriteStartDocument();
          xml.WriteStartElement( "SomeType" );
          xml.WriteElementString( "ID", "Something" );
          xml.WriteEndElement();
          xml.WriteEndDocument();
        }
      }

      header.FileName = "File2.xml";
      writer.WriteItemLocalHeader( header );
      using( Stream itemStream = writer.GetItemDataStream() )
      {
        using( XmlWriter xml = XmlWriter.Create( itemStream ) )
        {
          xml.WriteStartDocument();
          xml.WriteStartElement( "SomeOtherType" );

          byte[] someData = new byte[] { 12, 45, 67, 35, 67, 255, 255, 45 };

          // This is legal 
          writer.WriteItemData( someData );

          xml.WriteEndElement();
          xml.WriteEndDocument();
        }
      }

      byte[] someOtherData = new byte[] { 6, 34, 56, 108, 127, 98, 44, 35, 67, 255, 255, 45 };

      // This is also legal 
      writer.WriteItemData( someOtherData );
    }
  }
}