public static void DeleteInstance() { if (instance != null) { instance = null; } }
public static QuestionsViewModel GetInstance() { if (instance == null) { instance = new QuestionsViewModel(); } return(instance); }
public static void DeleteInstance() { if (instance != null) { instance = null; } }
public static QuestionsViewModel GetInstance() { if (instance == null) { instance = new QuestionsViewModel(); } return(instance); }