Efcore: EFCore in DotNetStandard2.0 Library contains not found dependencies

[isaacrlevin]

I have EFCore installed in a DotNetStandard2.0 CL and everything is working fine except I get a warning on Build regarding not found packages and resolution has to take place

This is the warning I get on Build

Severity    Code    Description Project File    Line    Suppression State
Warning NU1603  Microsoft.Extensions.Primitives 2.0.0-preview1-final depends on 
System.Runtime.CompilerServices.Unsafe (>= 4.4.0-preview1-25219-04)
but System.Runtime.CompilerServices.Unsafe 4.4.0-preview1-25219-04 was not found. 
An approximate best match of System.Runtime.CompilerServices.Unsafe 4.4.0-preview1-25305-02 
was resolved.   

Installing System.Runtime.CompilerServices.Unsafe explicitly fixes warning
Install-Package System.Runtime.CompilerServices.Unsafe -Pre

Steps to reproduce

Create New DotNetStandard2.0 CL
Add Microsoft.EntityFrameworkCore.SqlServer
Run Build

Further technical details

EF Core version: 2.0.0-preview2-final
Database Provider: Sql Server
Operating system: Windows 10 Pro
IDE: VS 2017 Prevew 3

[smitpatel]

Can you share your csproj file and Nuget.config?

[isaacrlevin]

Certainly

````

Exe
netcoreapp2.0

````

[smitpatel]

Check out https://github.com/aspnet/EntityFramework/issues/8923#issuecomment-310431600
In preview2-final there is no SqlServer.Design package. Please remove that line and try again.

[smitpatel]

After removing the stale package restore works fine for me.

[isaacrlevin]

That did it, thanks