private void CommonMenuClickHandler(object sender, RoutedEventArgs e)
        {
            FrameworkElement feSource = e.Source as FrameworkElement;

            switch (feSource.Name)
            {
            case "AddClient":
            case "AddClientBtn":
                AddClient addClientWin = new AddClient();
                addClientWin.ShowDialog();
                break;

            case "AddDistributor":
                AddDistributorWindow addDistributorWin = new AddDistributorWindow();
                addDistributorWin.ShowDialog();
                break;

            case "AddBeerBtn":
            case "AddBeer":
                AddBeer addBeerWin = new AddBeer();
                addBeerWin.ShowDialog();
                break;

            case "AddBrewery":
                AddBreweryWin addBreweryWin = new AddBreweryWin();
                addBreweryWin.ShowDialog();
                break;

            case "AddSale":
            case "AddSaleBtn":
                AddSaleWin addSaleWin = new AddSaleWin();
                addSaleWin.ShowDialog();
                break;

            case "SearchBeer":
                SearchBeerWin searchBeerWindow = new SearchBeerWin();
                searchBeerWindow.ShowDialog();
                break;

            case "SearchBeerBtn":
                SearchEditBeerWin searchEditBeerWindow = new SearchEditBeerWin();
                searchEditBeerWindow.ShowDialog();
                break;

            case "SearchClient":
            case "SearchClientBtn":
                SearchClient searchClient = new SearchClient();
                searchClient.ShowDialog();
                break;

            case "SearchSale":
            case "SearchSaleBtn":

                // do something ...
                break;

            case "SearchDistributor":
                //this.Close();
                SearchDistributorWin searchDistributorWin = new SearchDistributorWin();
                searchDistributorWin.ShowDialog();
                break;

            case "AboutApp":
                About abautWindow = new About();
                abautWindow.ShowDialog();
                break;

            case "ExitApp":
                // do something ...
                Application.Current.Shutdown();
                break;

            case "ShowSaleBtn":
            case "ShowSale":
                //this.Close();
                ShowSales showSalesWindow = new ShowSales();
                showSalesWindow.ShowDialog();
                break;
            }
            e.Handled = true;
        }