When you create a database snapshot , the create database statement cannot reference log files , offline files , restoring files , and defunct files 创建数据库快照时， create database语句不能引用日志文件、脱机文件、还原文件和不存在的文件。
When i described how javassist lets you add code , i mentioned that the added code could not reference local variables defined elsewhere in the method 在描述javassist是如何让您添加代码时，我提到添加的代码不能引用在方法中其他地方定义的局部变量。
For example , you can add references to any other managed code assembly to your solution ; however , you cannot reference another office project assembly 例如，您可以向解决方案添加对其他任何托管代码程序集的引用；然而，您不能引用另一个office项目程序集。
A strongly named application or component cannot reference a weak - named component , so strong - naming an exe prevents the exe from referencing weak - named dlls that are deployed with the application 强名称应用程序或组件不能引用弱名称组件，因此，对某个exe进行强命名会使该exe无法引用与应用程序一起部署的弱名称dll 。
When an expression is used with variables , the expression can use literals and the operators and functions that the expression grammar provides , but the expression cannot reference other variables or the columns from a data flow in the package 表达式和变量一起使用时，表达式可以使用文字以及表达式语法所提供的运算符和函数，但表达式不能引用其他变量或包中数据流的列。
So , to cut to the chase , in managed extensions , given the constraints just enumerated hopefully without too much confusion the language designers felt that the only viable representation of the managed reference type , was to reuse the existing pointer syntax references were not flexible enough since they cannot be reassigned and they are unable to refer to no object 因此，说到底，在托管扩展中，有了以上列举的约束（希望不会太令人费解） ，语言设计人员认为托管引用类型的唯一可行的表示法就是重用现有指针语法引用不够灵活，因为它们无法重新分配，且不能引用空对象：
