Guarding against old DLLs

[Jeff Stewart]

..NET applications look in the executable's directory (among other places)
for any DLLs that it depends on. If an application finds an older version
of a DLL than the one it was compiled against, does it exit gracefully or
crash? And, is that check performed at startup, or will it crash whenever a
newer call cannot be found in the older DLL?

--
Jeff S.

[Relaxin]

I suggest that you hide your DLL and find out.

"Jeff Stewart" <ob******@gmail.com> wrote in message
news:1104527362.33d4acfd7d20309cefde2b3c115ef214@t eranews...

.NET applications look in the executable's directory (among other places)
for any DLLs that it depends on. If an application finds an older version
of a DLL than the one it was compiled against, does it exit gracefully or
crash? And, is that check performed at startup, or will it crash whenever
a newer call cannot be found in the older DLL?

--
Jeff S.

[Jeff Stewart]

It doesn't exist yet. I'm trying to plan ahead.

--
Jeff S.
"Relaxin" <[e-mail]> wrote in message
news:us**************@TK2MSFTNGP10.phx.gbl...

I suggest that you hide your DLL and find out.

"Jeff Stewart" <ob******@gmail.com> wrote in message
news:1104527362.33d4acfd7d20309cefde2b3c115ef214@t eranews...

.NET applications look in the executable's directory (among other places)
for any DLLs that it depends on. If an application finds an older
version of a DLL than the one it was compiled against, does it exit
gracefully or crash? And, is that check performed at startup, or will it
crash whenever a newer call cannot be found in the older DLL?

--
Jeff S.

[Mattias Sjögren]

Jeff,

If an application finds an older version
of a DLL than the one it was compiled against, does it exit gracefully or
crash?
If the assembly doesn't have a strong name, it will simply load the
newer version and use that. Otherwise you'll get an exception that can
be handled to exit gracefully.

And, is that check performed at startup, or will it crash whenever a
newer call cannot be found in the older DLL?

It's done when the assembly is needed for the first time, which isn't
necessarily at startup.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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