Make ‘dotnet ef‘ work with EF Core 2.0
EF Core 2.0 changed the way the CLI looks for the DBContext to use. There are now two ways: Invoke BuildWebHost in Startup.cs Use the class implementing IDesignTimeDbContextFactory<T> BuildWebHost is called even if a class implements IDesignTimeDbContextFactory<T>. Solution for this problem: Rename BuildWebHost to e.g. _BuildWebHost (making it private isn’t enough). Next step: create the class DesignTimeDbContextFactory : public class DesignTimeDbContextFactory : IDesignTimeDbContextFactory<ApplicationDbContext> { public ApplicationDbContext CreateDbContext(string[] args) { IConfigurationRoot configuration = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json") .Build(); var builder = new DbContextOptionsBuilder<ApplicationDbContext>(); var connectionString = configuration.GetConnectionString("DefaultConnection"); builder.UseSqlSe