Hi, I would like to start migrating and develop asp.net using the framework 4.0/4.5 and I am a bit stuck I am currently have couples of web applications running FINE on windows 2003 R2 with latest service pack, IIS6 with all updates and .NET framework 3.5 and I am afraid that by just upgrading my production server with framework 4.0 or 4.5 my apps will stop working or some of the funtionality starts behaving adnormal or acting up I only have available one server and currently is the production server so I do not have any testing machine for testing environment before magrating so the big questions is? Can any out there gives some advice should I just go ahead and migrate with no problem or should I get into an environment test before migrating just so you know budget is pretty much tight and if upgrade will put me in a situation that my application does not behave the way is currently behaving I might loose the customers and these days with the bad economy it is not a good ...
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