private void BtnMostarListado_Click(object sender, RoutedEventArgs e)
{
WPF_ListadoContratos wlc = new WPF_ListadoContratos();
wlc.Owner = Window.GetWindow(this);
wlc.Owner.Name = "WPF_ListadoContratos";
wlc.Show();
}
private void TlListadoContratos_Click(object sender, RoutedEventArgs e)
{
WPF_ListadoContratos lcontratos = new WPF_ListadoContratos();
lcontratos.ShowDialog();
}