private void btnAddMaterial_Click(object sender, RoutedEventArgs e)
        {
            AddEditMateralWindow addEditMateralWindow = new AddEditMateralWindow();

            this.Opacity = 0.3;
            addEditMateralWindow.ShowDialog();
            UpdateTable();
            this.Opacity = 1;
        }
        private void btnEditMaterial_Click(object sender, RoutedEventArgs e)
        {
            AddEditMateralWindow addEditMateralWindow = new AddEditMateralWindow(lvMaterial.SelectedItem as Material);

            this.Opacity = 0.3;
            addEditMateralWindow.ShowDialog();
            Filtr();
            this.Opacity = 1;
        }