private void txtTexto_KeyPress(object sender, KeyPressEventArgs e)
 {
     if (cmbCampo.SelectedIndex == 0)
     {
         MetodosForms.OnlyIntergers(sender, e);
     }
 }
 private void txtTelefono_KeyPress(object sender, KeyPressEventArgs e)
 {
     MetodosForms.OnlyIntergers(sender, e);
 }