public MainForm()
{
Instance = this;
category = new Categories();
InitializeComponent();
InitializeApp();
AppDomain.CurrentDomain.ProcessExit += new EventHandler(OnProcessExit);
category = CategoryHandler.Load(CategoryHandler.filePath);
category.InitUI();
ChangeAddButton(StateManager.APP_STATE);
childForms = new List <Form>();
}
static void OnProcessExit(object sender, EventArgs e)
{
CategoryHandler.Save();
}