UseSqlServer method missing MVC 6

I am trying to implement Entity Framework 7 in MVC 6, and on this page here it says to do

services.AddEntityFramework()
    .AddSqlServer()
    .AddDbContext<MusicStoreContext>(options =>
                        options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]));

But for me, the UseSqlServer method isn’t visible? Anyone know how to make it visible? Or is this an old way of configuring entity framework?

My startup.cs file looks like this

using FluentValidation;
using Microsoft.AspNet.Builder;
using Microsoft.AspNet.Hosting;
using Microsoft.Framework.ConfigurationModel;
using Microsoft.Framework.DependencyInjection;

namespace me.namespace.project
{
    public class Startup
    {
        public static IConfiguration Configuration { get; set; }

        public Startup(IHostingEnvironment env)
        {
            // Setup configuration sources.
            Configuration = new Configuration()
                .AddJsonFile("config.json")
                .AddEnvironmentVariables();
        }

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

            // entity framework
            services.AddEntityFramework()
                .AddSqlServer()
                .AddDbContext<DataContext>();

        }
    }
}

Answers:

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Method 1

Install Microsoft.EntityFrameworkCore.SqlServer 1.0.1 package works for me
Version of Microsoft.EntityFrameworkCore is 1.1.0

Method 2

UseSqlServer is an extension method in the namespace Microsoft.Data.Entity so you need to import that in your code, like this:

using Microsoft.EntityFrameworkCore;

Method 3

Since this has been posted, assemblies have been renamed. As part of EntityFrameworkCore you now need to add a using statement the following

using Microsoft.EntityFrameworkCore;

And the .UseSqlServer extension method to configure your context will become available

Method 4

It’s a NuGet Packages Problem

Install the following Packages and with its Proper Versions

 1.  Microsoft.EntityFrameworkCore(Latest Version)
 2.  Microsoft.EntityFrameworkCore.SqlServer(1.0.4 Version)

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