static public bool SaveOrUpdate<T>(T entity) where T: class

        {

            bool result = false;

            using (wechatEntities context = new wechatEntities())

            {

                Type t = entity.GetType();

                PropertyInfo[] properts = t.GetProperties();

                PropertyInfo p = t.GetProperty("Id");

                if (p == null)

                    p = t.GetProperty("id");

                if (p == null)

                    p = t.GetProperty("ID");

                if (p == null)

                {

                    return result;

                }

                var id = Convert.ToInt32(p.GetValue(entity,null));

                if (id == )

                {

                    context.Set(entity.GetType()).Add(entity);

                }

                else

                {

                    context.Entry(entity).State = System.Data.EntityState.Modified;

                }

                result = true;

                context.SaveChanges();

            }

            return result;

        }