EF Core DotNet tool Migrations and Seed

sample.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using System;
using System.Linq;

namespace EFSeedDemo
{
    public class Program
    {
        public static void Main(string[] args)
        {
            BuildWebHost(args)
                .MigrateDbContext<SomeDbContext>(context =>
                {
                    if (!context.SomeEntities.Any())
                    {
                        context.SomeEntities.Add(new SomeEntity());
                        context.SaveChanges();
                    }
                }).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .Build();
    }
}

namespace Microsoft.AspNetCore.Hosting
{
    public static class IWebHostExtensions
    {
        public static IWebHost MigrateDbContext<TContext>(this IWebHost webHost,Action<TContext> seeder) where TContext : DbContext
        {
            using (var scope = webHost.Services.CreateScope())
            {
                var context = scope.ServiceProvider.GetService<TContext>();

                try
                {
                    context.Database
                        .Migrate();

                    seeder(context);
                }
                catch (Exception ex)
                {
                    var logger = scope.ServiceProvider.GetRequiredService<ILogger<TContext>>();
                    logger.LogError(ex, "An error occurred while migrating the database.");

                }
            }

            return webHost;
        }
    }
}