Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using TodoApi.Models;
using TodoApi.Services;

namespace TodoApi {
  public class Startup {
    public Startup (IConfiguration configuration) {
      Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices (IServiceCollection services) {
      services.AddScoped<BookService> ();
      services.AddDbContext<TodoContext> (opt => opt.UseInMemoryDatabase ("TodoList"));
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure (IApplicationBuilder app, IHostingEnvironment env) {
      if (env.IsDevelopment ()) {
        app.UseDeveloperExceptionPage ();
      } else {
        // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
        app.UseHsts ();
      }

      app.UseHttpsRedirection ();
      app.UseMvc ();
    }
  }
}