Program.cs example for ASP.NET core 3 that includes database seeding

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using CampaignPortal.Database;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace CampaignPortal
{
    public class Program
    {
        private static void HandleDatabaseCommands(List<string> arguments, IHost host)
        {
            //we always delete the database, but first lets make sure that the developer knows that
            if (!arguments.Contains("--force-db-deletion"))
            {
                var answer = "";
                while (answer.ToLower() != "y" && answer.ToLower() != "n")
                {
                    Console.WriteLine("This will ERASE the database. Are you sure you want to continue? (y/n)");
                    answer = Console.ReadLine();
                }

                if (answer == "n")
                {
                    return;
                }
            }

            using (var scope = host.Services.CreateScope())
            {
                var database = scope.ServiceProvider.GetRequiredService<DatabaseContext>();
                database.Database.EnsureDeleted();
                Console.WriteLine("Deleted Database");

                database.Database.EnsureCreated();
                Console.WriteLine("Created Database");

                if (arguments.Contains("seed"))
                {
                    Console.WriteLine("Starting seeding...");
                    Seeds.InstallDeveloperSeeds(database);
                    Console.WriteLine("Done seeding");
                }
            }
        }

        public static void Main(string[] args)
        {
            var arguments = new List<string>(args);
            var host = CreateHostBuilder(args).Build();

            if(arguments.Contains("seed") || arguments.Contains("clear"))
            {
                HandleDatabaseCommands(arguments, host);
            }
            else
            {
                Console.WriteLine("Starting server...");
                host.Run();
            }
        }
        

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
}