public class SchoolEntityService : DataService<SchoolEntities>
    {
        // This method is called only once to initialize service-wide policies.
        public static void InitializeService(DataServiceConfiguration config)
        {            
            // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
            // Examples:
            config.SetEntitySetAccessRule("*", EntitySetRights.All);
            config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);
            config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
         }
    }

        static void Main(string[] args)
        {
            //定义服务
            using (ServiceHost host = new ServiceHost(typeof(SchoolEntityService)))
            {
                host.Open();
                Console.WriteLine("WCF服务已启动，按任意键退出！");
                Console.ReadKey();
                host.Close();
            }
        }