public MainWindow() { InitializeComponent(); U.Update(); users.Text = String.Join(" ", U.users); passswords.Text = String.Join(" ", U.passwords); string line = Txt.ReadLine(); if (!(line == "None")) { int id = Convert.ToInt32(line); Window1 window1 = new Window1(U.users[id]); this.Hide(); window1.ShowDialog(); this.Show(); } }