Source Code for Custom Formatting of E-Mail Messages

<snippet id="7e635492-9adb-4569-8a27-093d23b3b51c" name="" devlang="CSharp" type="start"/> 
using System;
using System.IO;
using System.Text;
using System.Xml.Serialization;
using System.Runtime.Serialization;

using Microsoft.XLANGs.BaseTypes;

namespace Microsoft.Samples.BizTalk.XlangCustomFormatters
{
   public abstract class BaseFormatter : IFormatter
   {
      public virtual SerializationBinder Binder
      {
         get { throw new NotSupportedException(); }
         set { throw new NotSupportedException(); }
      }

      public virtual StreamingContext Context
      {
         get { throw new NotSupportedException(); }
         set { throw new NotSupportedException(); }
      }

      public virtual ISurrogateSelector SurrogateSelector
      {
         get { throw new NotSupportedException(); }
         set { throw new NotSupportedException(); }
      }

      public abstract void Serialize( Stream stm, object obj );
      public abstract object Deserialize( Stream stm );
   }

   public class RawStringFormatter : BaseFormatter
   {
      public override void Serialize(Stream s, object o)
      {
         RawString rs = (RawString)o;
         byte[] ba = rs.ToByteArray();
         s.Write( ba, 0, ba.Length );
      }

      public override object Deserialize(Stream stm)
      {
         StreamReader sr = new StreamReader( stm, true );
         string s = sr.ReadToEnd();
         return new RawString( s );
      }
   }

   [CustomFormatter(typeof(RawStringFormatter))]
   [Serializable]
   public class RawString
   {
      [XmlIgnore]
      string _val;

      public RawString(string s )
      {
         if (null==s) 
            throw new ArgumentNullException();
         _val = s;
      }

      public RawString()
      {
      }

      public byte[] ToByteArray()
      {
         return Encoding.UTF8.GetBytes( _val );
      }

      public override string ToString()
      {
         return _val;
      }
   }
}
<snippet id="7e635492-9adb-4569-8a27-093d23b3b51c" type="end"/>