Nuget包“此源中不可用”……但是VS仍然知道吗？

Question

I've come across a screen that I've never seen before, while playing with Npgsql.EntityFrameworkCore.PostgreSQL source code, looking for a bug that's blocking my app from running properly.

As things stand right now, I can't even build the source code.

I can't build this code, because the packages can't be found; yet, Visual Studio knows that the latest release is the one I want. How is this possible? What (if anything) can I do to get the packages installed?

Answer 1

Nuget package “Not available in this source”… but VS still knows about it?

You should select nuget.org as package source, not All . Tseng pointed the correct direction. You probably have a myget feed in your project/Visual Studio.

According to the package Microsoft.EntityFrameworkCore on the nuget.org, the latest version is only 2.1.0-preview1-final (current version) not have the version 2.1.0-preview3-32169 . So the package you have installed is not comes from nuget.org.

If you add a custom nuget feed with source: https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json

Then you will see the version 2.1.0-preview3-32169 .

So, to resolve this issue, you should select the nuget.org as package source or disable the package source from dotnet.myget.org.

Hope this helps.