carloscds

<connectionStrings>
    <add name="Contexto" 
        connectionString="data source=(local); initial catalog=EFIndice; user id=teste; password=teste" 
        providerName="System.Data.SqlClient"/>
</connectionStrings>

carloscds

public partial class CriacaoBanco : DbMigration
{
   public override void Up()
   {
       CreateTable(
           "dbo.Clientes",
                 c => new
                 {
                    ID = c.Int(nullable: false, identity: true),
                    Nome = c.String(maxLength: 100),

carloscds

public class Cliente
{
    public int ID { get; set; }
    [Index]
    [MaxLength(100)]
    public string Nome { get; set; }
    public string Cidade { get; set; }
    public string UF { get; set; }
}

carloscds

public class Cliente
{
    public int ID { get; set; }
    public string Nome { get; set; }
    public string Cidade { get; set; }
    public string UF { get; set; }
}

carloscds

public class Contexto : DbContext
{
    public DbSet<Cliente> Cliente { get; set; }
}

carloscds

static void Main(string[] args)
{
   Stopwatch contador = new Stopwatch();
   contador.Start();
   var db = new NorthwindContext();
   var dados = db.Customers;
   
   foreach(var c in dados)
   {

carloscds

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using InjecaoDependenciaDiretaEF.Data;
using InjecaoDependenciaDiretaEF.Models;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;

carloscds

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace InjecaoDependenciaDiretaEF.Services
{
    public class EnvioEmail : IEnvioEmail
    {
        public string Enviar() => "Email Enviado";

carloscds

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace InjecaoDependenciaDiretaEF.Services
{
    public interface IEnvioEmail
    {
        string Enviar();

carloscds

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();

            services.AddDbContext<AplicacaoContext>(options =>
                options.UseInMemoryDatabase("DBMemory"));

            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddScoped<IEnvioEmail, EnvioEmail>();
        }