同样的问题也会发生在操作系统的代码中：一个程序覆写操作系统的代码将垮掉操作系统。
The same problem would occur with operating system code, a program that overwrote part of the operating system code would crash the operating system.
在大部分情况下应用程序范围的设定是唯读的，这是因为它们只是程序资讯通常不需覆写。
In most cases, the application-scoped Settings are read-only; because they are program information, you will typically not need to overwrite them.
本章节的主题将说明如何覆写目标、修改预设工作及设定属性，以自订建置程序。
The topics in this section describe how to override targets, modify default tasks, and set properties to customize the build process.
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