Backwards compatibility

[Eyolan]

I have a question about Vista 64...if I write a program say in Visual Studio 2008 C# and compile it on Vista 64bit, would the app work on vista 32 and xp 32?

[Runningman]

yes, it will run under WOW64 or you can set it up to run under compatibiltiy mode...
http://en.wikipedia.org/wiki/WOW64


edit oh wait its compiled in a 64 bit envoriment....oh i think not....

[jcrox]

Originally Posted by Runningman

yes, it will run under WOW64 or you can set it up to run under compatibiltiy mode...
http://en.wikipedia.org/wiki/WOW64


edit oh wait its compiled in a 64 bit envoriment....oh i think not....

I didn't have any problems with any of my ASP.NET applications when creating them in Vista x64 and running them at school on 32 bit XP pro. The compiled files, as far as I know, are not platform dependent.

[Runningman]

Originally Posted by jcrox

I didn't have any problems with any of my ASP.NET applications when creating them in Vista x64 and running them at school on 32 bit XP pro. The compiled files, as far as I know, are not platform dependent.

Now that i think of it, ya, your right, because the compiler, if its a 32 bit compiler(with 64 bit capabilties) under a 64bit OS, it will compile it to a 32 bit file, unless you specify it to compile the file as 64 bit.

[Greg]

I believe a pure managed application (eg 100% C#) will run on either when developed on either. It is supposed to JIT (Just In Time compile) when run for the first time.