命名参数和可选参数是两个比较简单的特性，对于熟悉其他编程语言的开发者来说可选参数并不陌生，为参数提供默认值时就是可选参数：
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）。
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Pick and hold (or correct-simply click) within the folder you would like to restore and choose Pin to Speedy accessibility from your context menu.
To unzip a single file or folder, open the zipped folder, then drag the file or folder from your zipped folder to a different locale.
Zipped (compressed) information just take up considerably less space for storing and may be transferred to other personal computers more promptly than uncompressed files.
作者简介：一个热爱编程、善于分享、喜欢学习、探索、尝试新事物和新技术的全栈软件工程师。
For those who have concealed the remaining navigation pane and would like to help it become obvious with your File Explorer window, it is possible to demonstrate it once more utilizing these actions: Find Get started > File Explorer , or pick out the File Explorer icon while in the taskbar.
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可以安装不同的运行时。 请参阅选择正确的运行时一节，了解每个运行时包含的内容。
黑客和密码专家破解加密文件的办法主要有两个，第一是搜索密文是否有重复现象，第二是用暴力破解法获得密钥。首先我们考虑一下初始向量如何防止重复现象，然后再探讨一下防止暴力破解的关键问题。