When Are Supporting dll Assemblies Loaded Into AppDomain?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Smithers - 24 Sep 2007 19:49 GMT

My ASP.NET Web app uses a few 3rd party assemblies. Just wondering when
those are loaded into the Web app's AppDomain - and for how long do they
stay loaded.

Is an assembly loaded the first time a page is loaded (where the page in
question makes use of the 3rd party assembly)? Or are all assemblies
referenced by the Web app automatically loaded whenever the Web site starts
(or is restarted)?

Thanks.

Reply to this Message

bruce barker - 24 Sep 2007 20:38 GMT

unless your code dynamically loads dlls (via the api), asp.net loads all
dll at startup (first request).

the .net runtime has no method to unload a dll. the appdomain must be
unloaded to release a dll.

-- bruce (sqlwork.com)

> My ASP.NET Web app uses a few 3rd party assemblies. Just wondering when
> those are loaded into the Web app's AppDomain - and for how long do they
[quoted text clipped - 6 lines]
>
> Thanks.

Reply to this Message

Chris Fulstow - 25 Sep 2007 05:27 GMT

Hi

All the assemblies are loaded from the /bin folder as soon as your
application receives its first request.
The ApplicationManager creates a new AppDomain, which then loads your
third-party assemblies. They'll stay loaded for the lifetime of your
AppDomain.

To see exactly which assemblies are loaded at any point you can run
something like:

Dim assemblies() As Assembly = AppDomain.CurrentDomain.GetAssemblies()
For Each asm As Assembly In assemblies
Response.Write(String.Format("Loaded: {0}<br>", asm.FullName))
Next

Chris

> My ASP.NET Web app uses a few 3rd party assemblies. Just wondering when
> those are loaded into the Web app's AppDomain - and for how long do they
[quoted text clipped - 6 lines]
>
> Thanks.

Reply to this Message

When Are Supporting dll Assemblies Loaded Into AppDomain?

Free Magazines