Variable this.variable does not load the information for search, but for listing uploaded

Question

The code is available at:Github

I got the Main Class:

    static void Main(string[] args)
        {

            ControleClienteService controleCliente = new ControleClienteService();
            controleCliente.CarregarCliente();
            ControleConsultaService controleConsulta = new ControleConsultaService();
            controleConsulta.CarregarConsulta();



    Console.WriteLine("==== Lista de Clientes ====");
                            Console.WriteLine(controleCliente.Listar());
                            Console.ReadKey();
                            break;
}

When I call the controleCliente.Listar(), he brings the information.

Client class:

public class ControleClienteService
    {
        private List<Cliente> Clientes;

        public bool CadastrarCliente(int qtdCliente, string nome, string endereco, string telefones, string email, string dataNascimento)
        {
            try
            {
                Cliente cliente = new Cliente
                {
                    Id = qtdCliente,
                    Nome = nome,
                    Endereco = endereco,
                    Telefones = telefones,
                    Email = email,
                    DataNascimento = Convert.ToDateTime(dataNascimento)
                };

                this.Clientes.Add(cliente);
                return true;
            }
            catch
            {
                return false;
            }
        }

        public Cliente BuscarClienteId(int id)
        {
            Cliente cliente = new Cliente();
            if (this.Clientes != null)
            {
                cliente = this.Clientes.Where(x => x.Id == id).FirstOrDefault();
            }
            return cliente;

        }

        public bool CarregarCliente()
        {
            MClientes mClientes = new MClientes();
            this.Clientes = mClientes.PreencheClientes();
            return true;
        }

        public string Listar()
        {
            string retorno = "";
            foreach (Cliente C in this.Clientes)
            {
                retorno += C.Id.ToString() + "\n";
                retorno += C.Nome.ToString() + "\n";
                retorno += C.DataNascimento.ToString() + "\n";
                retorno += C.Telefones.ToString() + "\n";
                retorno += C.Endereco.ToString() + "\n";
                retorno += " \n";
            }
            return retorno;
        }

Query class:

public class MConsultas
    {
        List<Consulta> ConsultasClientes = new List<Consulta>();
        ControleClienteService ControleCliente = new ControleClienteService();
        ControleRestricaoAlimentarService RestricaoAlimentar = new ControleRestricaoAlimentarService();
        public List<Consulta> PreencheConsultas()
        {
            Consulta consulta = new Consulta
            {
                Id = 23,
                Cliente = ControleCliente.BuscarClienteId(23),
                RestricoesAlimentares = RestricaoAlimentar.BuscarRestricaoAlimentarId(23),
                Hora = Convert.ToDateTime("12:00"),
                Peso = 67,
                PercenteGordura = 34,
                Data = Convert.ToDateTime("19/12/2019")
            };
            // Adicionar na Lista
            ConsultasClientes.Add(consulta);

            return ConsultasClientes;
        }
    }

When you get to the calling part Cliente = ControleCliente.BuscarClienteId(23), Client class is empty, does not contain values. The controleConsulta.CarregarConsulta(); You should bring the Customer, however, always the Customer in the code is NULL.

How can I access the Customer, from the query class, equal I access from the Main class?

Answer 1

The problem, basically, is that the list of Clientes was never started, for this, just create a new builder in the class ControleClienteService, implementing the method CarregarCliente(). That should solve your problem.