private async void btnAgregar_Click(object sender, EventArgs e)
{
FrmRegistro re = new FrmRegistro();
re.ShowDialog();
await Refrescar();
}
private async void btnModificar_Click(object sender, EventArgs e)
{
if (GetId() != null)
{
FrmRegistro re = new FrmRegistro((int)GetId());
re.ShowDialog();
await Refrescar();
}
}