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Asked: 2026-05-11T12:06:13+00:00

In IIS6 it’s possible to have more than one ASP.NET application running in the

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In IIS6 it’s possible to have more than one ASP.NET application running in the same application pool. This is fine, except that there is nothing in IIS6 that prevents you from running multiple .NET versions in the same pool.

When you create application pools in IIS7 you must explicitly state was .NET version will be running in that pool. Running multiple .NET versions in IIS7, in the same application, is impossible.

How can I enforce such rules on my IIS6 server in order to prevent my deployment team from creating such problems?

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  1. What I do:

    Step 1. Create the following application pools:

    .NET 1.1 Apps
    .NET 2.0 Apps

    Step 2. Disable the ‘Default App Pool’

    Now, any time a new application is configured in IIS, it will not work right away because the default app pool is disabled. This forces the person configuring the application to select an app pool that is appropriate for the .NET framework version of the app.

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