Best practice for C# WCF Webservice To Be Consumed By Many SAP Clients

Hi Experts,
I am making a web service for an online payment site that will push payments made to our customers SAP systems. I am reading through the documentation how how to get sap to take in the wsdl and that all looks pretty straight forward. While I am waiting for the SAP trial to install can anyone give me some pointers to get me started in the right direction for a web service that can be consumed by possibly different versions and definitely different instances of SAP at different companies.
I am looking to do something similar to what can be down with the Quick books web connector although I realize SAP is a much more complex piece to work with.
I am a very experienced .net programmer and really just need some high level directions from anyone who has seen something similar to what I am building.
Thanks!
Jonathan
Edited by: JonRanes on Nov 11, 2009 3:08 AM

Ya as I was typing my message I realized I probably wasn't going to need the .net connector since I want a very generic service that basically just hands off the payment details to SAP.
As for what is going to consume the webservice ideally it would be independent of the type of SAP being used since potentially serveral different SAP installations would be able to access the service.
For the first version I am making the service be consumed by SAP Netweaver 7 Trial version. My company has a few clients using SAP lined up already to use the service once it is working but I don't know yet what version of SAP they each run.
If that is not possible I will either have to make a separate webservice for each type of SAP or else go another route and perhaps send the data as xml to SAP and let it import it on its own.
Right now I am playing around with the SOA manager, is that where the SAP PI is or am I on the wrong track.
I'll keep posting to this thread as I go along so someone in the future doing something similar can benefit.
I am trying to get the example at /people/wolfgang.bauer2/blog/2009/07/08/call-wcf-service-net-from-sap-with-usernametoken-and-ssl "Call WCF Service (.NET) from SAP with UsernameToken and SSL" going as a first step to understanding things.
Edited by: JonRanes on Nov 11, 2009 10:15 PM

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