using System;

public class Client

{

    string nom;

    string premon;

    string numeroClient;

    int age;

}

​

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Bienvenue");

        //Je déclare une variable client1 de typle client

        Client client1;

        Console.WriteLine(client1.nom);

    }

}