EF本身不支持WITH(NOLOCK), 都指出建议设置事务的级别为允许脏读.
IsolationLevel = IsolationLevel.ReadUncommitted
http://stackoverflow.com/questions/926656/entity-framework-with-nolock
http://stackoverflow.com/questions/24684914/get-entity-framework-6-use-nolock-in-its-underneath-select-statements
Entity Framework WITH(NOLOCK)的说明
原文：http://www.cnblogs.com/Flyear/p/5001082.html
