Entity Framework with nolock. 允许脏读

public static List<T> ToListReadUncommitted<T>(this IQueryable<T> query)
        {
            using (var scope = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions() { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted }))
            {
                List<T> toReturn = query.ToList();
                scope.Complete();
                return toReturn;
            }
        }

        public static int CountReadUncommitted<T>(this IQueryable<T> query)
        {
            using (var scope = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions() { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted }))
            {
                int toReturn = query.Count();
                scope.Complete();
                return toReturn;
            }
        }