检测数据库是否连接

public static bool CheckConnectionAvailableBySql()
 {
         SqlConnection conn = new SqlConnection(ConnectionString);
          try
          {
               conn.Open();
               return true;
          }
          catch (Exception ex) { return false; }
}

private void timer_Tick(object sender, EventArgs e)
{
        bool available = Program.CheckConnectionAvailableBySql();
        if (available)
        {               
            Console.WriteLine("server is available");
        }          

}