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Editorial Team
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Asked: 2026-06-05T20:08:35+00:00

I have a website setup in IIS with one web.config set at the root

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I have a website setup in IIS with one web.config set at the root for many sub-application virtuals (about 35), some of which use their own unique overrides/configurations.

I have two HttpModules that I would like to implement for all of the sub-apps at once. Without using the GAC, is there a way to specify the implementation in web.config so that these modules can apply to all sub-apps without re-compiling module code into each sub-application? Can I store the HttpModule assembly somewhere in the site structure that it can be utilized by all sub-apps?

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1 Answer

  1. Editorial Team

    It is possible to register a http module in the root web.config (system.webServer/modules section). The module must have a strong name (must be signed):

    <add name="MyModule" preCondition="managedHandler" type="MyModule.Namespace, MyModuleAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bfd166351ed997df" />

    Now IIS expects that the module is in the bin directory (or in GAC). dependentAssembly section instructs IIS where can be the assembly file found:

       <runtime>
        <assemblyBinding appliesTo="v2.0.50727" xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="MyModuleAssembly" publicKeyToken="bfd166351ed997df"/>
                <codeBase version="1.0.0.0"
                          href="file://c:/SharedLibs/MyModuleAssembly.dll" />
            </dependentAssembly>
        </assemblyBinding>
    </runtime>
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