using
2013-03-23 16:36
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using()语法，自动回收对象，跨好中放入需要回收的对象，在花括号中写代码，出了花括号系统就自动释放资源，using括号中的对象必须是实现了Idispose接口的对象，using括号只认识Idispose接口。
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