反射 是一种“程序即数据”范例，允许程序的一部分根据程序集、类型和成员动态查询和调用另一部分。 这对于后期绑定编程模型和工具非常有用。
注意：加密文件之后如果忘记了用来加密该文件的密码，再想恢复出原始文件就不可能了。当然，这与密码本身的复杂程度有关，要想保证文件的安全，最好采用较复杂的密码，例如混合运用字母、数字和特殊字符（如“$”符号等）。
B) Click on/tap on Variety, and click/faucet on an available sort of file to choose (dot) which which one particular You simply want included in search results.
To test it out in Home windows eleven, pick out it over the taskbar or the Start menu, or press the Home windows symbol essential + E with your keyboard.
To unzip one file or folder, open the zipped folder, then drag the file or folder with the zipped folder to a new locale.
Zipped (compressed) files consider up much less storage space and can be transferred to other computers more rapidly than uncompressed files.
Communities enable you to inquire and remedy concerns, give feed-back, and listen to from gurus with abundant expertise.
As you key in the Research Box, Windows Look for will mechanically commence a simple research in the index by default to match your typed textual content with folder names, information names, the contents of data files, and file Houses. It's going to then display the search engine results in File Explorer.
注意这段代码创建了三个文件流：fin，表示明文形式的原始文件；fout，加密结果文件；crStream，加密流，用来把DES加密的结果转入输出文件fout。增加一个crStream流的好处是不必把结果保存到临时文件或缓冲区。
针对泄密的最佳防范措施就是加密。有效的加密不仅杜绝了泄密，而且还防范了由泄密引发的攻击。加密技术有时还用于通信过程中的身份验证——如果某个用户知道密码，那么他应该就是那个拥有这一身份的人。
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下载安装程序或二进制版本后，请对其进行验证，以确保文件未被更改或损坏。 可以验证计算机上的校验和，然后将其与下载网站上报告的内容进行比较。
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