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Editorial Team
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Asked: 2026-05-26T20:05:13+00:00

Once upon a time, I had a ‘DEV’ configuration and a ‘Web.DEV.config’ transformation file

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Once upon a time, I had a ‘DEV’ configuration and a ‘Web.DEV.config’ transformation file for my project. I then removed that particular configuration…

…Now I want it again. Problem is, when I add the configuration, then try to add the config transformation to the project, I get the following Visual Studio complaint:

A file or folder with the name 'Web.DEV.config' already exists.
Please give a unique name to the item you are adding, or delete
the existing item first.

I’ve checked the physical directory of the project, and there is no such file. I searched my entire solution for ‘Web.DEV.config’, and there are 0 results. Why the heck is Visual Studio trying so hard to kill my productivity today?

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1 Answer

  1. Editorial Team

    The actual configuration was still lingering around….

    Even though I deleted the config file, the actual configuration was still there. Once I deleted the configuration (through the configuration manager), Visual Studio was happy once again!

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