@bernso said:However, the group is definitely into using Microsoft solutions, and I'll readily admit that I've never seen front ends in the miscellaneous Java technologies that could compete with the drag-and-drop interfaces you can build with Visual Studio.  So I've been thinking, why not interface the two technologies - a C# front end communicating via Web Services with a Java backend.  After all, it's pretty well acknowledged that though Microsoft is winning the desktop battle (including pretty, responsive interfaces), Java still has a slight advantage in the enterprise/server environment.  Is this a complete WTF or might there be some value to this blended architecture? It's perfectly possible to do that, and it will probably even help you to seperate the tiers and avoid vendor specific shortcuts that compromise the quality of the design, portabilty etc. Of course this should only be done if you have a group of developers for the front end and another group of developers for the back end. If you force people to work in C# and Java at the same time, the little differences between those two languages will drive them mad; at least you can say goodbye to coding style standards. One last thought: Microsoft has a terrible (yes terrible) record for maintaining the portability of their proprietary programming languages. Back in '98, they introduced VB6 proposed to write business logic in VB6 and place it in the MS Transaction Server. Only 5 years later, VB6 was legacy and while it's still possible to use it today, there will never be a 64 bit compiler for x86-64 Windows. Face it: it will be dead sooner or later. Moving it to VB.net is not as straight-forward as it should be. Five years (or ten years, for the matter) is a ridiculously short lifespan for business logic. It's perfectly okay to replace the front end every (say) 5-10 years; adapt it to new operating systems, make it more user friendly, utilitzing the growing power of PCs. But for any reasonably large system, you don't want to do that with the business logic. For that reason, I would prefer any other vendor than MS for the language used for the business logic. Once MS manages to keep a usable language upward-compatible and maintained for 15 years, I might reconsider my position. Let's wait for 2018 to see if C# is a good idea for business logic or not.