private void btnNuevo_Click(object sender, RoutedEventArgs e)
        {
            AddMaxMinView alta = new AddMaxMinView();

            try
            {
                MaxMinViewModel maxMinViewModel = new MaxMinViewModel();
                maxMinViewModel  = this.DataContext as MaxMinViewModel;
                alta.DataContext = maxMinViewModel.CreateAddMaxMinViewModel();
                alta.ShowDialog();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
 private void dtGridItems_MouseDoubleClick(object sender, MouseButtonEventArgs e)
 {
     if (sender != null)
     {
         DataGrid dg = sender as DataGrid;
         if (dg != null && dg.SelectedItems != null && dg.SelectedItems.Count == 1)
         {
             ModifyMaxMinView modify = new ModifyMaxMinView();
             try
             {
                 MaxMinViewModel maxMinViewModel = new MaxMinViewModel();
                 maxMinViewModel    = this.DataContext as MaxMinViewModel;
                 modify.DataContext = maxMinViewModel.CreateModifyMaxMinViewModel();
                 modify.ShowDialog();
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }
     }
 }