private void cloneUnitToolStripMenuItem_Click(object sender, EventArgs e) { if (tabControl1.SelectedTab != null) { string id = tabControl1.SelectedTab.Text; string data = (tabControl1.SelectedTab.Controls[0]).Text; try { string res = mod.CloneUnit(id, data); AddTab(res); } catch (Exception ex) { MessageBox.Show("Error while cloning " + id + "\r\n" + ex.Message, "Cloning errror", MessageBoxButtons.OK, MessageBoxIcon.Warning); } } }