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Editorial Team
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Asked: 2026-05-27T10:32:01+00:00

I am doing some work on a project and I am trying to get

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I am doing some work on a project and I am trying to get my development environment working. The project is written in ASP.net MVC 2. I have ASP.net MVC 3 installed. The controllers have been moved to a seperate project that is namespaced ProjectName.Web.Controllers. All of the controllers inherit from System.Web.MVC.Controller. When I try to hit a controller I get the following:

[HttpException]: The controller for path '/controllerName'; was not found or does not implement IController.

If I make a controllers folder in the web project that contains the views, copy all the controllers there and recompile, it works fine.

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  1. Editorial Team

    Finally figured out the problem in revisiting this today. The solution was created on a machine that did not have the latest version of ASP.Net MVC on it. It only had version 2 and worked just fine. My machine has version 3 and didn’t work. Turns out the controller project was referencing the version 3 assembly on my machine and the version 2 on the original machine. The reference looked like the following:

    <Reference Include="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
      <SpecificVersion>False</SpecificVersion>
      <HintPath>..\Web\bin\System.Web.Mvc.dll</HintPath>
</Reference>

    Since the web project is using version 2 of ASP.Net MVC that is why I was getting the error that the controller didn’t implement IController, it was looking for IController in version 2 not version 3.

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