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Visual Studio 2026 Insiders. Issue with Entity Framework UI (add migration)

Pearo 20 Reputation points
2026-01-18T06:07:30.3033333+00:00

Using the Blazor Web App Razor Movie Pages tutorial, I am trying to use the Connected Services UI to add a migration and update the database as per the instructions here. However it keeps complaining about ./dotnet-tools.json.

The tools are working fine. I can use package manager to create migrations and update the database, its just the ui that is the issue. If I keep deleting dotnet-tools.json I can sometime make it work.

Any ideas?

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Developer technologies | ASP.NET Core | Other
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Answer accepted by question author

AgaveJoe 31,361 Reputation points
2026-01-18T12:51:52.33+00:00

I noticed you are using the Visual Studio 2026 Insiders preview. Because this is a pre-release 'beta' channel, the Connected Services UI appears to have a regression bug in your specific build.

Two recommendations:

For the Tutorial: Since you mentioned the Package Manager Console works, I would stick to that. It is actually the standard method used in most Microsoft documentation (Add-Migration InitialCreate).

For your Environment: Unless you specifically need to test upcoming features, you should install the Stable release of Visual Studio 2026. It will be much more reliable for learning.

https://visualstudio.microsoft.com/downloads/

If you do want to stay on Insiders to help test, please report this UI bug to the team via Help > Send Feedback > Report a Problem.

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