private void ClickAgregar(object sender, RoutedEventArgs e)
{
var ventana = new DetallePrestamo();
ventana.Owner = Window.GetWindow(this);
ventana.ShowDialog();
ActualizarPrestamos();
}
private void Seleccionar(object sender, MouseButtonEventArgs e)
{
var ventana = new DetallePrestamo();
ventana.Prestamo = (sender as ListViewItem).Content as Modelos.Prestamo;
ventana.Owner = Window.GetWindow(this);
ventana.ShowDialog();
ActualizarPrestamos();
}