private void MainForm_Closing(object sender, CancelEventArgs e)
{
int num1 = StockDB.RealtimeChangedCount;
if ((num1 != 0) && (MessageBox.Show("Do you want to merge realtime data to historical database? Total:" + num1, "Confirm", MessageBoxButtons.YesNo) == DialogResult.Yes))
{
StockDB.MergeRealtime();
}
}