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Asked: 2026-05-14T01:10:59+00:00

Our codebase where I work is .NET 2.0. For our new assembly/DLLs/web applications I

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Our codebase where I work is .NET 2.0. For our new assembly/DLLs/web applications I would love to take advantage of what 3.5 has to offer.

Can one mix .NET frameworks(per assembly) in a solution? Are there any IIS related caveats to this?

I would love to hear any positive/negative/howto feedback. Let me know!

Thanks!

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  1. Editorial Team

    Yes you can do this in Visual Studio and it is called Multi-Targeting.

    Scott Guthrie has a great blog-entry on Multi-Targeting Support in Visual Studio.

    VS 2008 was the first release of
    Visual Studio that included
    multi-targeting support for .NET.
    What this meant was that you could use
    VS 2008 to create and edit not only
    .NET 3.5 projects, but also .NET 3.0
    and .NET 2.0 projects as well. This
    allowed developers to more quickly
    upgrade and take advantage of new
    Visual Studio tooling features –
    without having to necessarily require
    the newer version of .NET to be
    installed on the clients and
    production servers running their
    applications.

    Cheers

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