DI を使って、 Entity Framework Core (SQLite) をコンソールアプリで実行するサンプル。 (.NET 4.5.1, .NET Core 両対応) Nuget から、以下のパッケージを Install-Package する必要がある Microsoft.Extensions.Logging.Debug Microsoft.Extensions.Logging.Console Microsoft.Extensions.Configuration.Json Microsoft.EntityFrameworkCore.Tools Microsoft.EntityFrameworkCore.Sqlite

appsettings.json

{
  "ConnectionStrings": {
    "DefaultConnection": "Filename=Blogging.db"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  }
}

efcore-console-non-eftools-compliant-models.cs

using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;

public class BloggingContext : DbContext {
    public DbSet<Blog> Blogs { get; set; }
    public DbSet<Post> Posts { get; set; }

    public BloggingContext(DbContextOptions<BloggingContext> options) : base(options) { }
}

public class Blog {
    public int BlogId { get; set; }
    public string Url { get; set; }

    public List<Post> Posts { get; set; }
}

public class Post {
    public int PostId { get; set; }
    public string Title { get; set; }
    public string Content { get; set; }

    public int BlogId { get; set; }
    public Blog Blog { get; set; }
}

efcore-console-non-eftools-compliant.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Microsoft.EntityFrameworkCore;

// Nuget から、以下のパッケージを Install-Package する必要がある
// Microsoft.Extensions.Logging.Console
// Microsoft.Extensions.Configuration.Json
// Microsoft.EntityFrameworkCore.Tools
// Microsoft.EntityFrameworkCore.Sqlite

public class Program {
    public static void Main(string[] args) {
        var configuration = new ConfigurationBuilder()
            .SetBasePath(System.IO.Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json")
            .Build();
        
        var services = new ServiceCollection();
        services
            .AddLogging()
            .AddDbContext<BloggingContext>(options => {
                options.UseSqlite(configuration.GetConnectionString("DefaultConnection"), sqliteOptions => {
                });
            });
        var serviceProvider = services.BuildServiceProvider();

        serviceProvider.GetService<ILoggerFactory>()
            .AddConsole(configuration.GetSection("Logging"));

        using (var db = ActivatorUtilities.CreateInstance<BloggingContext>(serviceProvider)) {
            db.Blogs.Add(new Blog { Url = "http://blogs.msdn.com/adonet" });
            var count = db.SaveChanges();
            Console.WriteLine("{0} records saved to database", count);

            Console.WriteLine();
            Console.WriteLine("All blogs in database:");
            foreach (var blog in db.Blogs) {
                Console.WriteLine(" - {0}", blog.Url);
            }
        }
    }
}

説明のコメントに、 不要なパッケージをインストールするように書かれていたので、削除