CLR 2.0

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preport - 15 Mar 2006 03:50 GMT

I have a dll that I wrote in Visual Studio 2005 and would like to add it to
one of our older apps (CLR 1.1).
Can I do it? The machine has the .NET Framework 2.0 installed and the dll
doesn't do anything special. It doesn't utilize Generics or anything..
Just a lot of business logic code I don't want to re-write.

While I'm sure I could paste this in Visual Studio 2003 and compile it, it
would be nice if I didn't have to do that for every change and I could just
use the same dll across apps.

Any suggestions?

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Thomas Scheidegger [MVP] - 15 Mar 2006 12:17 GMT

Hi

>I have a dll that I wrote in Visual Studio 2005 and would like to add it to
> one of our older apps (CLR 1.1).

no, the assembly file format changed in 2.0,
thus the 1.1 runtime (nor VS 2003) can't read 2.0 assemblies.

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Thomas Scheidegger - MVP .NET - 'NETMaster'
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Kevin Yu [MSFT] - 16 Mar 2006 03:22 GMT

Hi proport,

I agree with Thomas, that the assembly file format changed in 2.0. It is
not forward compatibly, and you even cannot add reference to a .NET 2.0
class library in VS.NET 2003.

Kevin Yu

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SP - 16 Mar 2006 03:32 GMT

>I have a dll that I wrote in Visual Studio 2005 and would like to add it to
>one of our older apps (CLR 1.1).
[quoted text clipped - 7 lines]
>
> Any suggestions?

Develop it only in VS2003. Then you can use it with both 1.1 and 2.0
frameworks.

SP

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Jon Skeet [C# MVP] - 16 Mar 2006 08:23 GMT

> > While I'm sure I could paste this in Visual Studio 2003 and compile it, it
> > would be nice if I didn't have to do that for every change and I could
[quoted text clipped - 4 lines]
> Develop it only in VS2003. Then you can use it with both 1.1 and 2.0
> frameworks.

You'll need to test it on both, however. There are some subtle changes
to behaviour in 2.0, not all of which are documented.

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Wayne Hartell - 24 Apr 2006 13:40 GMT

Some subtle and some not so subtle changes. Hard crashes of .Net 1.1 apps
when 2.0 is present ain't subtle.... ;-)

>> > While I'm sure I could paste this in Visual Studio 2003 and compile it,
>> > it
[quoted text clipped - 8 lines]
> You'll need to test it on both, however. There are some subtle changes
> to behaviour in 2.0, not all of which are documented.

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CLR 2.0

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