Is it possible to use WSE 2.0 SP2 under VS 2008?
I realise that the add-in (that generates the proxy classes/configuration) is not compatible but there are work-arounds to this (copying over the files from a VS 2003 solution). Our web services are relatively static so would not be making too many changes anwyay.
We may at a future date move to WCF but taking baby-steps at the moment and want to get our existing services running under all the .NET 3.5 goodness.
I have been able to use WSE2 under VS2005/.NET 2.0 with no problems, but I dont know specifically about 2008. I needed Dime attachments (java web service - ugh.. what a headache) which are only in WSE2.
To get the functionality in VS, I actually installed WSE3 and then just changed the dll referenced in the application to the WebServices2 file and all of the Imports (VB - using c#) statements. After that, it worked like a charm.
I have not had any issues running wse2 with visual studio 2008 as long as your just using it like a library even after I switched to the 3.5 framework. But as you state the addin tools don't work.
You may want to use WSE 2.0 SP3 instead of SP2. Here is why: if you care about (or pay for) Microsoft support services for your application then SP3 is supported under the .NET 2.0 framework. I think there were some incompatibilities between SP2 & SP3 but the big thing is Microsoft specifically states that SP3 is supported on the .NET 2.0 framework. See the WSE 2.0 SP2 documentation and notice that it doesn't say .NET 2.0 is supported.
It looks like you want to convert/rewrite your app in the .NET 3.5 framework. Both .NET 2.0 & .NET 3.5 run under the same CLR 2.0 (yup, it's very confusing: a big thank you goes out to MS marketing!) so you probably are OK running WSE 2.0 SP3 with a.NET 3.5 app. But again, it not a supported configuration.