Simple IDesignTimeDbContextFactory example

BuildingDbContextFactory.cs

    public class FooDbContextFactory : IDesignTimeDbContextFactory<FooDbContext>
    {
        public FooDbContext CreateDbContext(string[] args)
        {
            var optionsBuilder = new DbContextOptionsBuilder<FooDbContext>();
            optionsBuilder.UseSqlServer("DeaultConnection");
            return new FooDbContext(optionsBuilder.Options);
        }
    }