private void miOpen_Click(System.Object sender, System.EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();

            if (ofd.ShowDialog() == DialogResult.OK)
            {
                database = new TrueFalse(ofd.FileName);
                database.Load();
                nudNumber.Minimum = 1;
                nudNumber.Maximum = database.Count;
                nudNumber.Value   = 1;
            }
        }
        private void miNew_Click(System.Object sender, System.EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();

            if (sfd.ShowDialog() == DialogResult.OK)
            {
                database = new TrueFalse(sfd.FileName);
                database.Add("Начальные данные", true);
                database.Save();
                nudNumber.Minimum = 1;
                nudNumber.Maximum = 1;
                nudNumber.Value   = 1;
            }
            ;
        }