public static SingletonForSqlConnection getInstance() { if (instance == null) { instance = new SingletonForSqlConnection(); } return(instance); }
public MainWindow() { InitializeComponent(); if (flag) { SingletonForSqlConnection.getInstance(); flag = false; } DataContext = new UserViewModel(this); Password.getInstance(); }
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) { SingletonForSqlConnection.Close(); }