public void Create(AreaAtuacao pArea)
        {
            sql.Append("INSERT INTO areadeatuacao (areaT, idVoluntario) " +
                "VALUES (@areaT, @idV)");

            cmm.CommandText = sql.ToString();
            cmm.Parameters.AddWithValue("@areaT", pArea.areaT);
            cmm.Parameters.AddWithValue("@idV", pArea.voluntario.idVoluntario);

            db.executarComando(cmm);
            sql.Clear();
        }
        public void Update(AreaAtuacao pArea)
        {
            sql.Append("UPDATE areadeatuacao " +
                "SET areaT = @areaT " +
                "WHERE idVoluntario = @idV");

            cmm.CommandText = sql.ToString();
            cmm.Parameters.AddWithValue("@areaT", pArea.areaT);
            cmm.Parameters.AddWithValue("@idV", pArea.voluntario.idVoluntario);

            db.executarComando(cmm);
            sql.Clear();
        }