About DependencyInjection issue

project.json

{
    "webroot": "wwwroot",
    "version": "1.0.0-*",
    "exclude": [
        "wwwroot"
    ],
    "packExclude": [
        "**.kproj",
        "**.user",
        "**.vspscc"
    ],
    "dependencies": {
        "Api": "1.0.0-*",
        "Model": "1.0.0-*",
        "DiscoverPackageSources": "0.1.27",
        "Microsoft.AspNet.StaticFiles": "1.0.0-*",
        "Microsoft.AspNet.Mvc": "6.0.0-*",
        "Microsoft.AspNet.Server.WebListener": "1.0.0-*",
        "Microsoft.AspNet.Hosting": "1.0.0-*",
        "Microsoft.Framework.ConfigurationModel": "1.0.0.0-beta3-10726",
        "Microsoft.Framework.ConfigurationModel.Json": "1.0.0-*",
        "Thinktecture.IdentityServer.v3": "1.0.0-*",
        "Thinktecture.IdentityServer.v3.AspNetIdentity": "1.0.0-*",
        "Thinktecture.IdentityModel.Core": "1.3.0",
        "Thinktecture.IdentityManager": "1.0.0-*",
        "Thinktecture.IdentityManager.AspNetIdentity": "1.0.0-*",
        "Microsoft.AspNet.Identity.Core": "2.1.0",
        "Microsoft.AspNet.Identity.Owin": "2.1.0",
        "Microsoft.AspNet.Identity.EntityFramework": "2.1.0",
        "Microsoft.AspNet.Owin": "1.0.0-*",
        "Microsoft.Owin": "3.0.0",
        "EntityFramework": "6.1.2.0",
        "Microsoft.Framework.DependencyInjection": "1.0.0.0-*"
    },
    "frameworks": {
        "aspnet50": { }
    },
    "commands": {
        "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --server.urls http://localhost:5001"
    }
}

Startup.cs

using Microsoft.AspNet.Builder;
using Microsoft.Framework.ConfigurationModel;
using Microsoft.AspNet.Hosting;
using Microsoft.Framework.DependencyInjection;
using Memorialis.Model;
using Microsoft.AspNet.Routing;
using Memorialis.Web.Utility;
using Memorialis.Identity;

namespace Memorialis.Web
{
    public class Startup
    {
        public IConfiguration Configuration { get; set; }
        
        public Startup()
        {
            // Setup configuration sources.
            Configuration = new Configuration()
                .AddJsonFile("config.json")
                .AddEnvironmentVariables();
        }

        /// <summary>
        /// Dependencies loading
        /// </summary>
        /// <param name="services">Collection of services</param>
        public void ConfigureServices(IServiceCollection services)
        {
            // Configure EF to use SQL server for primary Memorialis Context
            services.AddEntityFramework(Configuration)
                .AddSqlServer()                
                .AddDbContext<Context>();

            // Configure MVC
            services.AddMvc();
        }

        /// <summary>
        /// Middleware loading
        /// </summary>
        public void Configure(IApplicationBuilder app)
        {
            // Enable Identity Server
            app.Map("/id", _ => _.UseIdentityServer(IdentityServerConfig.Config()));

            // Enable Identity Manager
            app.Map("/idm", _ => _.UseIdentityManager(IdentityManagerConfig.Config()));

            // Enable static files
            app.UseStaticFiles();
            
            // Enable MVC for API hosting and server-based pages
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller}/{action}/{id?}",
                    defaults: new { controller = "Home", action = "Index" });
            });
        }
    }
}