Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Serialization;
using Sample.Models;

namespace Sample
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors();
            services.AddMvcCore();
            services.AddMvc()
                .AddJsonOptions(options => options.SerializerSettings.ContractResolver = new DefaultContractResolver());
            services.AddDbContext<SSWUGDemoContext>();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, SSWUGDemoContext dbContext)
        {
            loggerFactory.AddConsole();
            app.UseCors(builder => builder.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod());
            app.UseMvc();
        }
    }
}