Using mongodb with .net core

 1. Add nuget package MongoDB.Driver

2. Add a Book class to the Models directory with the following code:

C#

using MongoDB.Bson;
using MongoDB.Bson.Serialization.Attributes;

namespace BookStoreApi.Models;

public class Book
{
    [BsonId]
    [BsonRepresentation(BsonType.ObjectId)]
    public string? Id { get; set; }

    [BsonElement("Name")]
    public string BookName { get; set; } = null!;

    public decimal Price { get; set; }

    public string Category { get; set; } = null!;

    public string Author { get; set; } = null!;
}3. add connection string "BookStoreDatabase": {
        "ConnectionString": "mongodb://localhost:27017",
        "DatabaseName": "BookStore",
        "BooksCollectionName": "Books"
    }4. Add a CRUD operations service

using BookStoreApi.Models;
using Microsoft.Extensions.Options;
using MongoDB.Driver;

namespace BookStoreApi.Services;

public class BooksService
{
    private readonly IMongoCollection<Book> _booksCollection;

    public BooksService(
        IOptions<BookStoreDatabaseSettings> bookStoreDatabaseSettings)
    {
        var mongoClient = new MongoClient(
            bookStoreDatabaseSettings.Value.ConnectionString);

        var mongoDatabase = mongoClient.GetDatabase(
            bookStoreDatabaseSettings.Value.DatabaseName);

        _booksCollection = mongoDatabase.GetCollection<Book>(
            bookStoreDatabaseSettings.Value.BooksCollectionName);
    }

    public async Task<List<Book>> GetAsync() =>
        await _booksCollection.Find(_ => true).ToListAsync();

    public async Task<Book?> GetAsync(string id) =>
        await _booksCollection.Find(x => x.Id == id).FirstOrDefaultAsync();

    public async Task CreateAsync(Book newBook) =>
        await _booksCollection.InsertOneAsync(newBook);

    public async Task UpdateAsync(string id, Book updatedBook) =>
        await _booksCollection.ReplaceOneAsync(x => x.Id == id, updatedBook);

    public async Task RemoveAsync(string id) =>
        await _booksCollection.DeleteOneAsync(x => x.Id == id);
}