ASMX always communicates using SOAP and XmlFormatting. If you want binary responses look into .NET Remoting which also can run through IIS but requires different setups.

+++ Rick ---


>Hello,
>
>I'm using VS 2005 to build a web service. So far nothing spectacular, but I want to use the binary formatter to commuicate between client and web service. However, I can't find any simple way to do this.
>Any ideas?
>
>TIA,
>Martin