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Editorial Team
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Asked: 2026-05-29T07:21:57+00:00

In my Mvc Api controller, if the user cannot be authenticated I throw an

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In my Mvc Api controller, if the user cannot be authenticated I throw an HttpException 401. However, the RestSharp client seems to translate this into a Http 500 status code.

I want to be able to throw HttpExceptions from my Mvc controller, and have the RestSharp client preserve the original error in its StatusCode property.

Also, I notice if the server is not up, when the RestSharp client makes a request, the reponse has a status code of 0, and a response code of Error. Should the RestSharp not return a 404 http error code instead?

What I really need is a bit of documentation on how RestSharp works with HttpCodes.

Updated with code in my api controller:

throw new HttpException((int)HttpStatusCode.Unauthorized, AuthenticationError);
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1 Answer

  1. Editorial Team

    I’ve been able to investigate this issue myself. Forms Authentication is set on the web app which means that when a HttpUnauthorizedResult is returned from the controller, MVC kicks in and redirects to the login page. This has the effect of the client assuming that no errors occurred.

    I resolved this by using the aspnet.suppressformsredirect nuget package, and add the suppress flag into the response for authentication.

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