private void dataGridViewConceptRules_UserAddedRow(object sender, DataGridViewRowEventArgs e) { DocTemplateItem dti = new DocTemplateItem(); if (this.m_conceptleaf != null) { this.m_conceptleaf.Items.Add(dti); } else { this.m_conceptroot.ApplicableItems.Add(dti); } e.Row.Tag = dti; }