Using Microsoft.AspNetCore.All package in netstandard

Question

At the moment I\'m porting an asp web api to .Net Core.

The api uses a Class library which provides some implementations of the ActionFilterAttribute class.

Answer 1

The metapackage Microsoft.AspNetCore.All is only available for .NETCoreApp. This is by design since its explictly targeted as a convenience package for web applications running on .NET Core. In order to work its magic at publishing time (stripping of unused dependencies), it requires the .NET Core runtime store which is only available for .NET Core itself.

All other projects, including library projects running on .NET Standard but also including all projects that run on the full .NET Framework, should use individual package references instead.

So instead of referencing Microsoft.AspNetCore.All, you would be referencing e.g. Microsoft.AspNetCore, or Microsoft.AspNetCore.Mvc to get your ActionFilterAttribute.