a peculiar problem interfacing between managed/unmanaged code

[vinu]

Hi All,

I have a very peculiar problem using .NET framework.

I have a COM client(a dll that exposes COM interfaces for GUI applications)
written in C++ which
connects to a server(.exe written in C/C++) through SSL and SOAP.

We use netscape SSL libraries and SOAP requests are created by us as strings
and sent across to the
server.

1) I have written a VB6( not .NET) application which calls the COM client
which then connects to the server
through SSL and executes SOAP rquests.

2) I also have a .NET wrapper(.dll) written in C# which exposes the COM
client i mentioned above to managed applications.
Now if i write a program(.net C# .exe or VB.Net .exe also) which use this
..NET wrapper to call the COM client(which inturn calls the server)
there is a sudden increase in memory and if we send requests in a loop,
memory keeps on increasing.(This can be seen from the task manager).
And all this memory increase happens in the server(.exe) process.

But if i use the COM client directly as in 1) then there is no memory
increase in the server.

I find this strange as the server and my .NET program are running in two
different process spaces and we are
connecting through socket(SSL or plain).

My guess is this is happening because of some marshalling between managed
world and unmanged world.

Can anyone comment on this.

Thanks
Vinu