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using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;


namespace BooksWebApi
{
    public class Startup
    {

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namespace BooksWebApi.Entities
{
  public class Category
  {
	public long Id { get; set; }
	public string Description { get; set; }
  }
}

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namespace BooksWebApi.Entities
{
  public class Book
  {
    public long Id { get; set; }
    public string Name { get; set; }
    public string AuthorName { get; set; }
    public int Edition { get; set; }
    public DateTime PublicationDate { get; set; }
    public string ISDN { get; set; }

gmartinezsan

namespace BooksWebApi.Entities
{
  public class Category
  {
    public long Id { get; set; }
    public string Description { get; set; }
  }
}

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using Microsoft.AspNetCore.Identity;

namespace BooksWebApi.Entities
{
  public class User : IdentityUser
  {
    public string FirstName { get; set; }
    public string LastName { get; set; }
  }
}

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namespace BooksWebApi.Entities
{
  public class Category
  {
    public long Id { get; set; }
    public string Description { get; set; }
    public List<Book>Books { get; set; }
  }
}

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public class Startup
{
  public IConfiguration Configuration { get; set; }

  public Startup(IHostingEnvironment env)
  {
      var builder = new ConfigurationBuilder()
       .SetBasePath(env.ContentRootPath)
       .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
       .AddEnvironmentVariables();

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 public class BooksCatalogDbContext : IdentityDbContext
  {
    public BooksCatalogDbContext(DbContextOptions<BooksCatalogDbContext> options)
            : base(options)
    {
    }
    public DbSet<Book> Books { get; set; }
    public DbSet<Category> Categories { get; set; }    
  }

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{
  "ConnectionStrings": {
    "DefaultConnection": "Data Source=HOST\\SQLEXPRESS;Initial Catalog=DbBooksCat;Connect Timeout=30;Encrypt=False; Integrated Security=SSPI;"    
  },
  "Logging": {
    "IncludeScopes": false,
    "Debug": {
      "LogLevel": {
        "Default": "Debug"
      }

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using BooksWebApi.Data;
using BooksWebApi.Entities;
using Microsoft.EntityFrameworkCore;

public class CrudRepository : ICrudRepository
{