private void radeliminarCorreo_CheckedChanged(object sender, EventArgs e)
{
label2.Visible = false;
txtCorreoPasajero.Visible = false;
label14.Visible = true;
cmbcorreosPasajero.Visible = true;
btnagregarCorreo.Visible = false;
btnmodificarCorreo.Visible = false;
btneliminarCorreo.Visible = true;
cmbcorreosPasajero.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
}