public DataSet Query(string SQLString)
        {
            using (OleDbConnection connection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Persist Security Info=True;Data Source=|DataDirectory|\YTNum.accdb;Jet OLEDB:Database Password=;"))
            {
                DataSet ds = new DataSet();
                try
                {
                    connection.Open();
                    using (OleDbDataAdapter command = new OleDbDataAdapter(SQLString, connection))
                    {
                        command.Fill(ds, "ds");
                    }
                }
                catch (System.Data.OleDb.OleDbException ex)
                {
                    throw new Exception(ex.Message);
                }
                return ds;
            }
        }

    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            new DB ().Query("Select * from sysConfig");
            Application.Run(new XtraForm1());
        }
    }