SIPSorcery.DialPlanWizard.DeleteCNAM C# (CSharp) Method

        private void DeleteCNAM(object sender, System.ComponentModel.CancelEventArgs e)
        {
            SIPDialplanLookup cnamEntry = m_cnamDataGrid.SelectedItem as SIPDialplanLookup;
            MessageBoxResult confirmDelete = MessageBox.Show("Press Ok to delete CNAM " + cnamEntry.LookupKey + ".", "Confirm Delete", MessageBoxButton.OKCancel);
            if (confirmDelete == MessageBoxResult.OK)
            {
                e.Cancel = true;
                m_riaContext.SIPDialplanLookups.Remove(cnamEntry);
                m_riaContext.SubmitChanges(SubmitComplete, null);
            }
            else
            {
                e.Cancel = true;
            }
        }