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Editorial Team
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Asked: 2026-05-31T14:26:07+00:00

I just want to use HttpUtility.UrlEncode(myString) . The project is .NET 3.5. But I

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I just want to use HttpUtility.UrlEncode(myString). The project is .NET 3.5. But I can’t find the corresponding dll. In .NET 4.0 it seems to be in System.web. But I’m not sure where it’s located for 3.5

Can someone show me where I can download the corresponding dlls?

(And also, I would really prefer it if I don’t need to download an installation package, since that ususally results in GAC-ing the stuff. I hate when stuff gets GAC-ed, it just increases the risk of not catching missing references after deploying in an environment where the installation package hasn’t been run.)

(Why is it always like this with .net? …So hard to find the proper dll. With java I don’t remember it being that tricky to find the right jar file. But with .net it’s often a mystery which update, framework installation etc things are located in)

edit:
Ok, this is embarrassing, I thought the assembly was missing from my framework… but turns out it was in the “add reference” list all along, it just wasn’t sorted on the name column of the component. …thanks.

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1 Answer

  1. Editorial Team

    Still System.Web according to http://msdn.microsoft.com/en-us/library/system.web.httputility(v=vs.90).aspx

    Namespace: System.Web
    Assembly: System.Web (in System.Web.dll)

    Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

    You don’t need to worry about downloading or installing anything in the GAC, as it’s already part of the framework. If you have the relevant .NET framework installed, it’ll be there.

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