Error running update-database entityframeworkcore 2 c# entity-framework-core


I have EntityFrameworkCore 2.0.2 installed in a class library on a solution containing an AspNet Core WebApi.

I have the following packages installed in the project;

Microsoft.AspNetCore.Identity.EntityFrameworkCore - 2.0.2

Microsoft.EntityFrameworkCore - 2.0.2

Microsoft.EntityFrameworkCore.SqlServer - 2.0.2

Microsoft.Extensions.Identity.Stores - 2.0.2

System.Data.SqlClient - 4.4.3

My Class library project invokes the context as follows;

 public class MyContextFactory : IDesignTimeDbContextFactory<MyDataContext>
        public MyContextFactory()

        public MyDataContext CreateDbContext(string[] args)
            var builder = new DbContextOptionsBuilder<MyDataContext>();

            return new MyDataContext(builder.Options);

I am getting the following error, when I try to run the update-database command from the package manager console.

Application startup exception: System.IO.FileNotFoundException: Could not find file 'C:\Users\matt\Source\Repos\project\Services.WebApi\bin\Debug\netcoreapp2.0\ef.xml'.

this now occurs when I try to add-migration as well.

I can't find any detail on ef.xml and how it is generated? Can anyone tell me what is going on here.

If I run an add-migration i get the migration generated, but then get the error;

An error occurred while calling method 'BuildWebHost' on class 'Program'. Continuing without the application service provider. Error: Could not find file 'C:\Users\matt\Source\Repos\project\Services.WebApi\bin\Debug\netcoreapp2.0\ef.xml'.

I have tried cleaning the project, re-compiling (there are no errors), I have also looked in the referenced folder and the file doesn't exist. Nor (from a file search) has it been generated elsewhere?

The migrations have been working fine now?

Per request my BuildwebHost is;

 public static IWebHost BuildWebHost(string[] args) =>

and I add EF in my Startup.cs;

            options => options
4/30/2018 12:07:21 PM

Popular Answer

The commands you are using update-database and add-migration don´t look like the supported Entity Framework Core CLI commands:

  • dotnet ef add migrations <migration-name>
  • dotnet ef database update

Also check this SO question for further information: Entity Framework Core 2.0 add-migration not generating anything

4/30/2018 11:02:07 AM

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