public VoluntaryController()
        {
            string connectionString = ConfigurationManager.ConnectionStrings["conexao"].ToString();

            //injetando a dependencia do repositorio na aplicação
            voluntaryRepository  = new VoluntaryRepository(connectionString);
            voluntaryApplication = new VoluntaryApplication(voluntaryRepository);
        }
 public VoluntaryApplication(IVoluntaryRepository voluntaryRepository)
 {
     this.voluntaryRepository = voluntaryRepository;
 }