private void btChangeAddresses_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count != 2)
{
MessageBox.Show("Выберите две строки");
return;
}
RP r1 = rp(dataGridView1.SelectedRows[0].Index);
RP r2 = rp(dataGridView1.SelectedRows[1].Index);
string ca = r1.CurAddress;
r1.SetCurAddress(r2.CurAddress, true);
r2.SetCurAddress(ca, true);
this.update();
}