Setting de-batched message specific message context properties in custom disassembler

Question

I have recently created a custom disassemble component which can handle a message batch. The message batch can contain multiple messages and the custom component during de-batching recognizes this and does appropriate disassembly. All this is working fine.
The issue I have is that in the disassembler in the disassembled message part I copy the base message context, then assign additional properties. This is resulting in the context of the base message getting modified and as a result, all messages come into
BizTalk with the same context (which is wrong) but the correct message data.
So I could trace it to the statement debatchedMessage.Context = pInMsg.Context. It is not the copy but the reference which is being passed which is causing an overwrite and causing me grief.
Anybody else noticed this behavior? or perhaps knows of a fix? or perhaps knows of a method which will allow me to
COPY the message context?
Regards.

Answer 1

What you are seeing is the expected behavior.  You are correct:
debatchedMessage.Context = pInMsg.Context
merely assigns the context as a reference.
There is no shortcut to copying the context properties as there is in an Orchestration so you have to copy them one by one:
for (int i = 0; i < pInMsg.Context.CountProperties; i++)
string Name
string Namespace;
object PropValue = pInMsg.Context.ReadAt(i, out Name, out Namespace);
if (pInMsg.Context.IsPromoted(Name, Namespace))
outMsg.Context.Promote(Name, Namespace, PropValue);
else
outMsg.Context.Write(Name, Namespace, PropValue);