Asp.net web api exception only after deploying at IIS : A route named 'HelpPage_Default' is already in the route collection

Question

I\'ve read this question and tried the solutions mentioned there but I\'m getting this exception only after i published the application to IIS of a remote server. In my loca

Answer 1

1. Right click your solution in Visual Studio -> click Clean Solution
2. Remove all files under your \Project\bin\ folders
3. Rebuild your solution in Visual Studio Cheers.

Answer 2

I had this same issue and tried multiple proposed solutions from different threads with similar issues and got nowhere.

I finally just checked out a clean copy of the solution from team explorer and that fixed it for me.

Answer 3

I renamed a Namespace by refactoring it and doing that missed this hardcoded string:

Project > Areas > HelpPage > AppStart:

public static class HelpPageConfig
    {
        [SuppressMessage("Microsoft.Globalization", "CA1303:Do not pass literals as localized parameters",
            MessageId = "<CORRECT NAMESPACE>.Areas.HelpPage.TextSample.#ctor(System.String)",

Answer 4

I just ran into the same issue. I think the error was caused because I had pushed another solution to my site previously and there were leftover files that were somehow getting in the way.

To fix this I checked the box that says "Remove additional files at destination" while publishing through Visual Studio to my Azure site. I would assume you could just manually delete any old files that were on the server before publishing as well. After this the site ran fine with no errors.

Answer 5

I have the same issue after renamed the project name. So,

1. Find & Replace the correct name across the entire solution.
2. Clean solution
3. Delete bin & obj folder of the project.
4. Rebuild solution

..yes, it works.

Answer 6

I had the same issue when deploying application on Local IIS. My publish directory and IIS hosting directory are same. I tried with following steps, it worked for me:

1. Click on Solution >> publish
2. Delete existing file>> settings>> expand file publish options
3. check checkbox Delete all existing files prior to publish is true;
4. check checkbox Precompile during publishing is true.