framework compatability

[Bob Bins]

When upgrading a application from 1.1 to 2.0 3rd party assemblies needed to
be rebuilt for the 2.0 framework so they didn't have the performance hit of
running in side by side mode.

Is there any benifit to recompiling version 2.0 assemblies to 3 or 3.5 when
being used in a 3.0 or 3.5 application if their not using any of the new
functionality? Is there still the side by side performance hit when not
using the assemblies not built with the latest?

 

[Jon Skeet [C# MVP]]

When upgrading a application from 1.1 to 2.0 3rd party assemblies needed to
be rebuilt for the 2.0 framework so they didn't have the performance hit of
running in side by side mode.

Is there any benifit to recompiling version 2.0 assemblies to 3 or 3.5 when
being used in a 3.0 or 3.5 application if their not using any of the new
functionality? Is there still the side by side performance hit when not
using the assemblies not built with the latest?

No. Rebuilding it would effectively produce the same binary. With 1.1,
you were running a different runtime. With 2.0 you're running the same
runtime whether you're using 2.0, 3.0 or 3.5.

Jon