C# AI Coding

// AI-Generated ASP.NET Core Web API with Clean Architecture using Microsoft.AspNetCore.Mvc; using Microsoft.EntityFrameworkCore; using System.ComponentModel.DataAnnotations; // Domain Entity with Data Annotations public class User { public int Id { get; set; } [Required] [EmailAddress] [MaxLength(255)] public string Email { get; set; } = string.Empty; [Required] [MaxLength(100)] public string Name { get; set; } = string.Empty; public UserRole Role { get; set; } = UserRole.User; public DateTime CreatedAt { get; set; } = DateTime.UtcNow; public DateTime UpdatedAt { get; set; } = DateTime.UtcNow; } public enum UserRole { User, Admin, Moderator } // Repository Pattern with Entity Framework public interface IUserRepository { Task<User?> GetByIdAsync(int id); Task<User?> GetByEmailAsync(string email); Task<IEnumerable<User>> GetAllAsync(int page = 1, int pageSize = 10); Task<User> CreateAsync(User user); Task<User> UpdateAsync(User user); Task<bool> DeleteAsync(int id); } public class UserRepository : IUserRepository { private readonly ApplicationDbContext _context; public UserRepository(ApplicationDbContext context) { _context = context; } public async Task<User?> GetByIdAsync(int id) { return await _context.Users .AsNoTracking() .FirstOrDefaultAsync(u => u.Id == id); } public async Task<User?> GetByEmailAsync(string email) { return await _context.Users .AsNoTracking() .FirstOrDefaultAsync(u => u.Email.ToLower() == email.ToLower()); } public async Task<IEnumerable<User>> GetAllAsync(int page = 1, int pageSize = 10) { return await _context.Users .AsNoTracking() .OrderBy(u => u.Name) .Skip((page - 1) * pageSize) .Take(pageSize) .ToListAsync(); } public async Task<User> CreateAsync(User user) { _context.Users.Add(user); await _context.SaveChangesAsync(); return user; } public async Task<User> UpdateAsync(User user) { user.UpdatedAt = DateTime.UtcNow; _context.Users.Update(user); await _context.SaveChangesAsync(); return user; } public async Task<bool> DeleteAsync(int id) { var user = await _context.Users.FindAsync(id); if (user == null) return false; _context.Users.Remove(user); await _context.SaveChangesAsync(); return true; } } // Service Layer with Business Logic public interface IUserService { Task<UserDto?> GetUserByIdAsync(int id); Task<IEnumerable<UserDto>> GetAllUsersAsync(int page, int pageSize); Task<UserDto> CreateUserAsync(CreateUserRequest request); Task<UserDto?> UpdateUserAsync(int id, UpdateUserRequest request); Task<bool> DeleteUserAsync(int id); } public class UserService : IUserService { private readonly IUserRepository _userRepository; private readonly IMapper _mapper; private readonly ILogger<UserService> _logger; public UserService( IUserRepository userRepository, IMapper mapper, ILogger<UserService> logger) { _userRepository = userRepository; _mapper = mapper; _logger = logger; } public async Task<UserDto?> GetUserByIdAsync(int id) { var user = await _userRepository.GetByIdAsync(id); return user != null ? _mapper.Map<UserDto>(user) : null; } public async Task<UserDto> CreateUserAsync(CreateUserRequest request) { // Check if user already exists var existingUser = await _userRepository.GetByEmailAsync(request.Email); if (existingUser != null) { throw new InvalidOperationException($"User with email {request.Email} already exists"); } var user = _mapper.Map<User>(request); var createdUser = await _userRepository.CreateAsync(user); _logger.LogInformation("User created with ID: {UserId}", createdUser.Id); return _mapper.Map<UserDto>(createdUser); } } // ASP.NET Core Controller with OpenAPI Documentation [ApiController] [Route("api/[controller]")] public class UsersController : ControllerBase { private readonly IUserService _userService; public UsersController(IUserService userService) { _userService = userService; } [HttpGet("{id}")] World C# Benefits

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• Rapid API development: ASP.NET Core scaffolding and configuration
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