using static System.Console;
 
public class HelloWorld {
    public static void Main() {
        Veiculo veiculoT = new Veiculo();
        WriteLine("veiculoT");
        veiculoT.diagnostico();
        veiculoT.liga();
        veiculoT.teste();
        veiculoT.compra();
        WriteLine("---------------");
        Veiculo carro = new Carro();
        WriteLine("carro");
        carro.diagnostico();
        carro.liga();
        carro.teste();
        carro.compra();
        WriteLine("---------------");
        Carro carro2 = new Carro();
        WriteLine("carro2");
        carro2.diagnostico();
        carro2.liga();
        carro2.buzina();
        carro2.teste();
        carro2.compra();
	}
}
 
interface IFuncionamento {
    void liga();
}
 
static class Funcionamento {
    public static void liga(this IFuncionamento func) => WriteLine("Ligou!");
    public static void buzina() => WriteLine("Buzinou!");
}
 
static class Testador {
    public static void teste(this IFuncionamento veiculo) {
        WriteLine("Vai testar");
        veiculo.liga();
    }
}
 
static class Financeiro {
    public static void compra(this Veiculo veiculo) {
        WriteLine("Comprou N: " + veiculo.id);
        veiculo.diagnostico();
        veiculo.liga();
    }
}
 
class Veiculo : IFuncionamento {
    public int id = 1;
    public void diagnostico() {
        Funcionamento.liga(this);
        Funcionamento.buzina();
        liga();
        WriteLine("Tudo ok!");
    }
	public virtual void liga() => Funcionamento.liga(this);
}
 
class Carro : Veiculo {
    public override void liga() => WriteLine("Vrom!");
    public void buzina() => WriteLine("bi bi!");
}
 
//https://pt.stackoverflow.com/q/121240/101

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