Error when starting application using EF 7 after adding dependencies and updating model classes

I am running MVC 6 and EF 7 and changed my models and want to run the application, however I am getting an error and it is not clear what the reason is.

below is a snippet from my project.json

"dependencies": {
"EntityFramework.Commands": "7.0.0-beta5",
"EntityFramework.SqlServer": "7.0.0-beta5",
"Microsoft.AspNet.Antiforgery": "1.0.0-beta6",
"Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Google": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta5",
"Microsoft.AspNet.Diagnostics": "1.0.0-beta5",
"Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta5",
"Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta5",
"Microsoft.AspNet.Mvc": "6.0.0-beta5",
"Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5",
"Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
"Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
"Microsoft.AspNet.Session": "1.0.0-beta6",
"Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
"Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5",
"Microsoft.Framework.Configuration.Abstractions": "1.0.0-beta5",
"Microsoft.Framework.Configuration.Json": "1.0.0-beta5",
"Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta5",
"Microsoft.Framework.Logging": "1.0.0-beta5",
"Microsoft.Framework.Logging.Console": "1.0.0-beta5",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta5"
},

      

        
        
        
      

    

Below is the web page error.

System.MissingMethodException Method not found: "Boolean Microsoft.Framework.DependencyInjection.ServiceCollectionExtensions.TryAdd (Microsoft.Framework.DependencyInjection.IServiceCollection, Microsoft.Framework.DependencyInjection.ServiceDescriptor). In Microsoft.Framework.DependencyInjectionCollection service (ISG). at Microsoft.AspNet.Hosting.WebHostBuilder.BuildHostingServices () at Microsoft.AspNet.Hosting.WebHostBuilder.Build () at Microsoft.AspNet.Loader.IIS.RuntimeHttpApplication.ApplicationStart (application IHttpApplication.Loader.ApplicationStart (app IHttpApplication.LoHePlication) .InvokeApplicationStart (IHttpApplication Application)