public LibraryForm()
{
InitializeComponent();
darkMode = ManageUserAction.GetDarkMode();
if (darkMode)
{
UpdateTheme();
}
this.KeyPreview = true;
ManageSystem.InitLibrary();
curFlashCard = ManageSystem.GetFlashCard(index);
ChangeFlashCard(curFlashCard.Eng, curFlashCard.IdCard);
InitAutoCompleteTextBox();
}