private void tsmiOpen_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
databaseOfQuestions = new TrueFalse(openFileDialog.FileName);
databaseOfQuestions.LoadFromXMLFormat();
nudNumber.Minimum = 1;
nudNumber.Maximum = databaseOfQuestions.Count;
nudNumber.Value = 1;
TurnButtons(false);
cboxTrue.Enabled = true;
btnAnswer.Enabled = true;
}
}