.NET 2002 vs .NET 2003

TheIceman65 · October 13th, 2004, 07:19 PM

Will a VB.net application compiled for .NET framework 1.0 run on the .NET framework 1.1?

r_ganesh76 · October 13th, 2004, 11:10 PM

No

Regards
Ganesh

stu9820 · October 14th, 2004, 07:17 AM

If you open it with VS.NET 2003 it will ask you to let it convert it to 2003 and warn you that it can't go back to 2002.

r_ganesh76 · October 14th, 2004, 07:23 AM

He was asking about the application and not the project

Regards
Ganesh

bmains · October 14th, 2004, 08:19 AM

I would recompile it in VS.NET 2003 (if you have it) and that should make it compatible, provided there weren't any changes to your code as a result of the 1.1 framework. I don't see why it wouldn't be because Microsoft made most (if not all) of it backwards-compatible. Ganesh do you know something that I don't?

Brian

Hal Levy · October 14th, 2004, 09:31 AM

Brian,

I know there are a few products out there with a 1.0 and a 1.1 version- including from microsoft.. so there has to be a difference?

Hal Levy
I am here to help you, not do it for you.

bmains · October 14th, 2004, 10:35 AM

Obviously there is a difference, but I would think a 1.0 app still should run on 1.1, or at least work if recompiled in VS.NET 2k3...

Imar · October 14th, 2004, 11:28 AM

Even without recompiling, many .net 1 applications will run on 1.1

You can indicate in the application's config file what runtime is supported and/or required.

Take a look here: http://www.eggheadcafe.com/articles/20030412.asp

Even the reverse is possible. Quoted from the link: "However, allowing 1.1 applications to execute in the version 1.0 Framework is much more difficult."

So, it's difficult, but not impossible. To make it work, you have to consider the list of "breaking changes" http://www.gotdotnet.com/team/change...1/default.aspx

If you use something in 1.1 that's not supported in 1 or vice versa; otherwise there's a fair chance it will work.

I think the 2002/2003 versions of software are mainly for VS.NET. You can upgrade from 2002 to 2003 when you open a solution, but the other way around is not possible....

Cheers,

Imar
---------------------------------------
Imar Spaanjaars
Everyone is unique, except for me.

r_ganesh76 · October 14th, 2004, 11:15 PM

Hal is right Brian...I sometimes get an error while trying to run an application compiled in 1.0 in 1.1. But once i load the project and do a recompile, it works okey.

Regards
Ganesh

planoie · October 20th, 2004, 01:36 PM

Something import to consider: The original post asks about "VB.NET applications". In my development environment, all the .NET code is in ASP.NET using VB.NET. This I certainly regard as an application. Of course, I think most people assume the question regarded a windows forms application. As .NET development progresses (particularly as we move to longhorn applications) the line between web based and desktop based will get very fuzzy.

When you install .NET 1.1 on a web server, in probably 99% of the cases you won't have a problem running ASP.NET binaries compiled with 1.0. Yes, the 1.0 code will run on 1.1 framework (and vice versa). It will run on whatever framework is handling the web requests in IIS as long as there are no compatibility problems with the classes or namespaces. I've been developing a web site at home in 1.1 (VS 2003) and it's actually running on framework 2.0, no problems!

The differences between 2002 and 2003 that I am aware of are some security class issues and a few XML namespace issues. However they are pretty specific and isolated. It was shear luck that someone happened to have written some code that was using a class that had some obsolete methods in 1.1. Otherwise, I did a complete upgrade of quite a large body of code and didn't have problems.