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请讲一讲 C# 中 using 关键字的三种用法,
请讲一讲 C# 中 using 关键字的三种用法,并说明各自的使用场景与核心价值。 作用:导入命名空间或创建类型别名,避免写冗长全限定名。 价值:减少代码噪音,提升可读性;别名可解决类型名冲突(如两个库都有 Logger)。 作用:声明作用域内自动释放的 ...
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