efcore: .NET Core CLI commands fail when wrong imports were used for first run of dotnet-restore

Updated my Visual Studio with RC 2 and created a Web API project.

Followed documentation guidelines for new application with existing database.

The following error was thrown hitting Scaffold-DbContext.

System.IO.FileNotFoundException: Could not load file or assembly 'Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The system cannot find the file specified. File name: 'Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'
    at Microsoft.DotNet.ProjectModel.ProjectReader.ReadProject(Stream stream, String projectName, String projectPath, ProjectReaderSettings settings)
   at Microsoft.DotNet.ProjectModel.ProjectReader.GetProject(String projectPath, ProjectReaderSettings settings)
    at Microsoft.EntityFrameworkCore.Tools.DispatchCommand.<>c__DisplayClass2_0.<Create>b__0()
    at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args) 
   at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)
 Could not load file or assembly 'Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The system cannot find the file specified.

Got a similiar Newtonsoft related error using CLI dotnet ef.

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 22 (11 by maintainers)

Most upvoted comments

@mhenderson442 thanks for that. I suspect this is related to imports. Try this to fix it

Delete %USERPROFILE%\.nuget\packages\.tools\Microsoft.EntityFrameworkCore.Tools and %USERPROFILE%\.nuget\packages\Microsoft.EntityFrameworkCore.Tools. (cref https://github.com/dotnet/cli/issues/2978)
Make sure your “tools” section matches this:

Preview 1

  "tools": {
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net451+win8"
    }

Preview 2

  "tools": {
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
    }

cref https://docs.efproject.net/en/latest/miscellaneous/cli/dotnet.html 3. Re run dotnet restore and look in the output for errors. VS will trigger this automatically when you save project.json and spits output to “Output > Package Manager”. 4. If commands still fail, can you share the files in %USERPROFILE%\.nuget\packages\.tools\Microsoft.EntityFrameworkCore.Tools?

+11

natemcmaster on Jun 29, 2016

@ole1986 as the issue describes, your imports are incorrect. For preview1, use “portable-net451+win8” See https://github.com/aspnet/EntityFramework/issues/5458#issuecomment-221912806

natemcmaster on Jul 19, 2016