the project must provide a value for configuration Error when install Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation in Core3.1

Question

When I install Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation in a Web project and in Startup add :

 services.AddMvc().AddRazorRuntimeCompilation();

,the project does not run and the error is:

the project must provide a value for configuration

my .NET-Core version is 3.1

How can this be fixed?

Can you share the package references of the project file?

Yiyi You
– Yiyi You

2020-06-15 08:13:05 +00:00
Commented Jun 15, 2020 at 8:13 — Yiyi You
– Yiyi You, Commented Jun 15, 2020 at 8:13
See the answer here: stackoverflow.com/a/65221807/88204

James Lawruk
– James Lawruk

2020-12-09 17:26:23 +00:00
Commented Dec 9, 2020 at 17:26 — James Lawruk
– James Lawruk, Commented Dec 9, 2020 at 17:26

jspinella · Accepted Answer · 2020-11-20 14:58:04Z

5

There are some GitHub issues with this problem and some solutions that have worked for people. That said I would check to see that all NuGet packages are on versions supported by .NET Core 3.1. At this particular moment that means not too new so as to only work with .NET 5 and not too old so as to only work with Core 2.2.

Otherwise, someone suggested restarting VS.

https://github.com/dotnet/sdk/issues/9932

You may also try deleting Microsoft.AspNetCore.Razor.Design from the CsProj file per this duplicate question

edited Nov 20, 2020 at 14:58

answered Nov 20, 2020 at 14:52

jspinella

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1 Comment

Danimal111 Over a year ago

Deleting Microsoft.AspNetCore.Razor.Design from the CsProj file did the trick for me. Thank You!

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