Not to preempt Yann's answer, but for what it's worth, here's a full example of copying a message body into a new message with a different action header. You could add or customize other headers as a part of the example as well. I spent too much time writing this up to just throw it away. =)
class Program
{
[DataContract]
public class Person
{
[DataMember]
public string FirstName { get; set; }
[DataMember]
public string LastName { get; set; }
public override string ToString()
{
return string.Format("{0}, {1}", LastName, FirstName);
}
}
static void Main(string[] args)
{
var person = new Person { FirstName = "Joe", LastName = "Schmo" };
var message = System.ServiceModel.Channels.Message.CreateMessage(MessageVersion.Default, "action", person);
var reader = message.GetReaderAtBodyContents();
var newMessage = System.ServiceModel.Channels.Message.CreateMessage(MessageVersion.Default, "newAction", reader);
Console.WriteLine(message);
Console.WriteLine();
Console.WriteLine(newMessage);
Console.WriteLine();
Console.WriteLine(newMessage.GetBody<Person>());
Console.ReadLine();
}
}