I wouldn't mind configuring the web.config myself( good ol' asp.net habit) as long as i knew what these endpoints and mex-es do exactly. Yes i went deep at once, you are correct but i think i understand most of it except maybe the mex and the IMetadataExchange.
Anyhow, your 6 points are correct and i would add some more.
7)Accept data from win app (probably a dataset)
8)Return data to win app
9)Using 3.5 framework is not a problem, i can go as high as 4.5 framework.
I think i have managed 1. 2. 4. 9. but with the warning that i completely deleted the Iservice.vb code page.
Unfortunately now that i have found you on-line i must leave for a job but i will take a look at any suggestions tonight.
P.S. Would also be nice to see a security example.Just saying because you mentioned it and i was not using any security log in at all but i will have a look at this also.
Thank Gary i'll see any suggestions later on. Will try to reproduce the error i got tonight and be more specific as i would be in my home PC.
Cheers.
P.S. The WCF is also called from the winforms app ok , but when i try to request some data then it give the exceptions.