"services.AddCaching();" and " app.UseSession();" not working

Hi,

I am in tutorial Managing Application State. I followed everything it says, yet I couldn't get a working result. In the Startup.cs file function

 public void ConfigureServices(IServiceCollection services)

When I added

 services.AddCaching();

I got

Error	CS1061	'IServiceCollection' does not contain a definition for 'AddCaching' and no extension method 'AddCaching' accepting a first argument of type 'IServiceCollection' could be found (are you missing a using directive or an assembly reference?)

And in function

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)

when I added

app.UseSession();

I got

Error	CS1061	'IApplicationBuilder' does not contain a definition for 'UseSession' and no extension method 'UseSession' accepting a first argument of type 'IApplicationBuilder' could be found (are you missing a using directive or an assembly reference?)	

Here is my reference part in the Startup.cs

using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using CanBuy.Data;
using CanBuy.Models;
using CanBuy.Services;

And here is my project.json file dependency section:

"dependencies": {"Microsoft.NETCore.App": {"version": "1.0.0-rc2-3002702","type": "platform"
    },"Microsoft.ApplicationInsights.AspNetCore": "1.0.0-rc2-final","Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final","Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final","Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final","Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final","Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final","Microsoft.AspNetCore.Razor.Tools": {"version": "1.0.0-preview1-final","type": "build"
    },"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final","Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final","Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final","Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final","Microsoft.EntityFrameworkCore.Tools": {"version": "1.0.0-preview1-final","type": "build"
    },"Microsoft.AspNet.Session": "1.0.0-rc1-final","Microsoft.Extensions.Caching.Memory": "1.0.0-rc2-final","Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final","Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final","Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final","Microsoft.Extensions.Logging": "1.0.0-rc2-final","Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final","Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final","Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final","Microsoft.VisualStudio.Web.CodeGeneration.Tools": {"version": "1.0.0-preview1-final","type": "build"
    },"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {"version": "1.0.0-preview1-final","type": "build"
    }
  },

What could be wrong? Myself didn't do anything except copying/pasting "services.AddCaching();" and " app.UseSession();". One obvious difference is I am using AspNetCore, while the sample uses AspNet. But I just get them from the template.