private void onInsert()
        {
            mdc = new Model.Model();
            try
            {
                Materias_ADD materia = new Materias_ADD();

                materia.tbNome.Text          = materia.tbNome.Text.Trim();
                materia.tbDescricao.Text     = materia.tbDescricao.Text.Trim();
                materia.tbDataCadrastro.Text = materia.tbDataCadrastro.Text.Trim();
                Convert.ToDateTime(tbDataCadrastro);

                InsertOnSubmit(materia);

                mdc.change();

                Response.Redirect("Materias.aspx");
            }
            catch (Exception)
            {
                Response.Redirect("Materias.aspx");
            }
            finally
            {
                mdc.Dispose();
            }
        }
 private void InsertOnSubmit(Materias_ADD materia)
 {
     throw new NotImplementedException();
 }