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2.14 C#编程规则
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C#高级编程（第3版）【全文连载】
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2.14 C#编程规则
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2006-8-17 16:57:00
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<div style='float:left;width:49%'>·<a href='100162748.htm'>2.11 控制台I/O</a></div><div style='float:right;width:49%'>·<a href='100162749.htm'>2.12 使用注释</a></div><div style='float:left;width:49%'>·<a href='100162750.htm'>2.13 C#预处理器指令</a></div><div style='float:right;width:49%'>·<a href='100162752.htm'>2.15 小结</a></div><div style='float:left;width:49%'>·<a href='100165324.htm'>目录</a></div><div style='float:right;width:49%'>·<a href='100165325.htm'>译者序</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><p class="MsoNormal"><span style="FONT-FAMILY: 宋体">本节介绍编写</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">程序时应注意的规则。</span></p>
<h3 style="MARGIN: 8.15pt 0cm"><span lang="EN-US">2.14.1 </span><span style="FONT-FAMILY: 黑体">用于标识符</span><span style="FONT-FAMILY: 黑体">的规则</span></h3>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">本节将讨论变量、类、方法等的命名规则。注意本节所介绍的规则不仅是规则，也是</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">编译器强制使用的。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">标识符是给变量、用户定义的类型</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">例如类和结构</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">和这些类型的成员指定的名称。标识符区分大小写，所以</span><span lang="EN-US">interestRate </span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US"> InterestRate</span><span style="FONT-FAMILY: 宋体">是不同的变量。确定在</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">中可以使用什么标识符有两个规则，</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; TEXT-INDENT: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt 'Times New Roman'"> </span></span><span style="FONT-FAMILY: 宋体">它们必须以一个字母或下划线开头，但可以包含数字字符；</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; TEXT-INDENT: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt 'Times New Roman'"> </span></span><span style="FONT-FAMILY: 宋体">不能把</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">关键字用作标识符。</span></p>
<p class="MsoNormal"><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">包含如表</span><span lang="EN-US">2-16</span><span style="FONT-FAMILY: 宋体">所示的保留关键字。</span></p>
<p class="a5" style="MARGIN-TOP: 8.15pt"><span style="FONT-FAMILY: 黑体">表</span><span lang="EN-US"> 2-16</span></p>
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<td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 81.4pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="109">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">abstract</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">do</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">In</span></p>
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<td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 97.35pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="130">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">protected</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">true</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">as</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">double</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">Int</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">public</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">try</span></p>
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