Demo/UI/UserConsole.cs

using Demo.Domain.UseCase;
using Demo.domain.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo.UI
{
    public class UserConsoleUI
    {
        IUserUseCase _userUseCase;
        public UserConsoleUI(IUserUseCase userUseCase) {
            _userUseCase = userUseCase;
        }

        public void RemoveUserByGuid(Guid guidUser) {

            string output = _userUseCase.RemoveUserByGuid(guidUser) ? "Пользователь удален" : "Пользователь не удален";
            Console.WriteLine(output);
        }

        public void DisplayAllUsers()
        {
            StringBuilder userOutput = new StringBuilder();
            foreach (var user in _userUseCase.GetAllUsers())
            {
                userOutput.AppendLine($"{user.Guid}\t{user.FIO}\t{user.Group.Name}");
            }
            Console.WriteLine(userOutput);
        }

        public void UpdateUser(User user)
        {
            try
            {
                User output = _userUseCase.UpdateUser(user);
                StringBuilder userOutput = new StringBuilder();
                userOutput.AppendLine($"Обновленный пользователь: {output.Guid}\t{output.FIO}\t{output.Group.Name}");
                Console.WriteLine(userOutput);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Ошибка при обновлении пользователя: {ex.Message}");
            }
        }

        public void GetUserByGuid(Guid guid){
            User output = _userUseCase.GetUserByGuid(guid);
            StringBuilder userOutput = new StringBuilder();
            userOutput.AppendLine($"{output.Guid}\t{output.FIO}\t{output.Group.Name}");
            Console.WriteLine(userOutput);
        }
    }
}