The error message is too vague

[doggy8088]

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• Please check that the documentation does not explain the behavior you are seeing.
• Please search in both open and closed issues to check that your bug has not already been filed.

Include your code

I can reproduce the issue every time. Just clone my code: https://github.com/doggy8088/VS2022ScaffoldingBug

Here are the steps to reproduce the issue:

1. Open Solution Explorer, Right-click on the Controllers folder, then Add > Controller.

2. Choose the item template: MVC Controller with views, using Entity Framework

   Model class: Course

   DbContext class: ContosoUniversityContext

   Hit Add button.

3. Then you will see the following error:

   There was an error running the selected code generator: 'Exception of type 'System.InvalidOperationException' was thrown.'

   

The error message is really too vague. I took 2 hours to figure it out the root cause. I think the error message can be improved.

I also reported this issue there for VS2022: https://developercommunity.visualstudio.com/t/I-wish-there-is-a-feature-that-can-save/10691680?port=1025&fsid=ce2921a1-dd02-402d-8377-b214f05199a5

Include stack traces

N/A

Include provider and version information

Microsoft.VisualStudio.Web.CodeGeneration.Design version: 8.0.2 Target framework: .NET 8.0 Operating system: Microsoft Windows [Version 10.0.19045.4412] IDE: Visual Studio 2022 17.10.3