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问:如何简便快速的转换字符数组到字符串？<br>
答:char[] ar;<br>
string s = new string(ar);<br>
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问:我想遍历窗体中的某个控件(如datetimepicker)，怎么办？ <br>
答:foreach(co......
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声明约束
在 c# 中，程序可以为泛型类中声明的每个类型参数提供可选约束列表。约束表示要将一个类型构造成泛型所必须满足的要求。可以使用 where 关键字声明约束，该关键字后跟“参数-要求”对，其中“参数”必须是泛型中定义的某个参数，“要求”必须是类或接口。
为了满足在 dictionary 类中使用 compareto 方法的需要，程序可以对 keytype 类型参数添加约束，......
GetVolumeSerialNumberinC#
recently somebody asked how to get the hard drive serial number in vb.net. the easy answer of course is to use vbscript with the wmi classes. actually, this gets the "volume" serial number, not the hard-coded manufacturers hard drive serial number, which needs to be retrieved with custom software that can vary by drive manufacturer. the "volume" serial number is created when you format a drive, and it can be changed without reformatting, although in practice people rarely do so.
i thought it might be a good experiment to try and do this using the native windows api "getvolumeinformation" instead, which requires p/invoke, in c#. this can be useful information for software and control developers as it can be used to verify licensing for a single computer. for example, on installation we could read the volume serial number of the users c: ...
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c#锐利体验
第四讲 类与对象[/b]
南京邮电学院 李建忠（cornyfield@263.net）
组件编程不是对传统面向对象的抛弃，相反组件编程正是面向对象编程的深化和发展。类作为面向对象的灵魂在c#语言里有着相当广泛深入的应用，很多非常“sharp”的组件特性甚至都是直接由类包装而成。对类的深度掌握自然是我们“sharp xp”重要的一环。
类
c#的类是一种对包括......
