<?xml version="1.0" encoding="utf-8"?>
<configuration>

     <configSections>
          <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
          <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
     </configSections>

     <startup>
          <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
     </startup>

     <entityFramework>
          <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
               <parameters>
                    <parameter value="mssqllocaldb" />
               </parameters>
          </defaultConnectionFactory>
          <providers>
               <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
          </providers>
     </entityFramework>

</configuration>

<?xml version="1.0" encoding="utf-8"?>
<configuration>

     <configSections>
          <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
          <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
     </configSections>

     <startup>
          <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
     </startup>

     <connectionStrings>
          <add name="MyConnection1" connectionString="Data Source=EVGENI\MSSQLSERVER2012;Initial Catalog=MyDatabase1;Integrated Security=True;" providerName="System.Data.SqlClient" />
     </connectionStrings>

     <entityFramework>
          <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
               <parameters>
                    <parameter value="mssqllocaldb" />
               </parameters>
          </defaultConnectionFactory>
          <providers>
               <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
          </providers>
     </entityFramework>

</configuration>

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

using System.Data.Entity;

namespace ConsoleApplication1
{
     public class Book
     {
          public int Id { get; set; }
          public string Name { get; set; }
          public int Price { get; set; }
     }

     class UserContext : DbContext
     {
          public UserContext()
               : base("MyConnection1")
          { }

          public DbSet<Book> Books { get; set; }
     }
    
     class Program
     {
          static void Main(string[] args)
          {
               // create db context
               using (UserContext db = new UserContext())
               {
                    // создаем объекты Book
                    Book book1 = new Book { Name = "Граф Монтекристо", Price = 123 };
                    Book book2 = new Book { Name = "Властелин колец", Price = 267 };
                    Book book3 = new Book { Name = "Три кота", Price = 125 };

                    // добавляем объекты Book в контекст данных
                    db.Books.Add(book1);
                    db.Books.Add(book2);
                    db.Books.Add(book3);

                    // сохраняем контекст данных в базу данных
                    db.SaveChanges();
               }
          }
     }
}