static void Clean()
{
ManagerBLL bll = new ManagerBLL();
Console.WriteLine("Debut Clean");
try
{
List <Task> tasks = new List <Task>();
tasks.Add(bll.ClearBaseAsync());
Task.WaitAll(tasks.ToArray());
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine("Fini");
}