图标用于标识项目中使用的分层结构，如命名空间、类型、介面、枚举和类。
Icons identify hierarchical structures employed within your projects, such as namespaces, types, interfaces, enums, and classes.
特性向程序集的元数据提供信息，这对于源分类器(如命名空间)并无意义。
An attribute contributes information to the assembly's metadata, which is not meaningful for source classifiers such as namespaces.
在这种用法中，很多xml特定的语义(如命名空间和空白行为)都不重要。
In this usage scenario, many of the XML specific semantics, such as namespaces and white space behavior, are not important.
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