public static CategoryManager getInstance()
{
if (instance == null)
instance = new CategoryManager();
return instance;
}
public CategoryWindow()
{
InitializeComponent();
// Get CategoryManager
categoryManager = CategoryManager.getInstance();
// Bind Window list to Category list
this.categoryList.ItemsSource = categoryManager.CategoryList;
// Disable while no category is selected
this.buttonEdit.IsEnabled = false;
this.buttonDelete.IsEnabled = false;
}