private void buttonDelete_Click(object sender, EventArgs e) { if (dataGridView1.SelectedRows.Count != 0 && dataGridView1.SelectedCells[0] != null) { ControlFunctions.RemovePerson((int)dataGridView1.SelectedCells[4].Value); FillDataGridView(db.PersonSet.ToList()); dataGridView1.Refresh(); } else { MessageBox.Show("Человек не выбран"); } }