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<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">下面看看</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">中定义的类型。我们将列出每个类型，以及它们的定义和对应</span><span lang="EN-US">.NET</span><span style="FONT-FAMILY: 宋体">类型</span><span lang="EN-US">(CTS </span><span style="FONT-FAMILY: 宋体">类型</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">的名称。</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">有</span><span lang="EN-US">15</span><span style="FONT-FAMILY: 宋体">个预定义类型，其中</span><span lang="EN-US">13</span><span style="FONT-FAMILY: 宋体">个是值类型，</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体">个是引用类型</span><span lang="EN-US">(string </span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US"> object)</span><span style="FONT-FAMILY: 宋体">。</span></p>
<h3 style="MARGIN: 8.15pt 0cm"><span lang="EN-GB">2.4.3 &nbsp;</span><span style="FONT-FAMILY: 黑体">预定义的值类型</span></h3>
<p class="MsoNormal"><span><span style="FONT-FAMILY: 宋体">内置的值类型表示基本数据类型，例如整型和浮点类型、字符类型和</span><span lang="EN-US">bool</span></span><span style="FONT-FAMILY: 宋体">类型。</span></p>
<h4 style="TEXT-INDENT: 21.45pt"><span lang="EN-GB">1. </span><span style="FONT-FAMILY: 黑体">整型</span></h4>
<p class="MsoNormal"><span><span lang="EN-US">C#</span></span><span style="FONT-FAMILY: 宋体">支持</span><span lang="EN-US">8</span><span style="FONT-FAMILY: 宋体">个预定义整数类型，如表</span><span lang="EN-US">2-1</span><span style="FONT-FAMILY: 宋体">所示。</span></p>
<p class="a5" style="MARGIN-TOP: 8.15pt"><span style="FONT-FAMILY: 黑体">表</span><span lang="EN-US">&nbsp; 2-1</span></p>
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            <p class="a2"><span style="FONT-FAMILY: 黑体">名</span><span lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="FONT-FAMILY: 黑体">称</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: 94.7pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="126">
            <p class="a2"><span lang="EN-US">CTS </span><span style="FONT-FAMILY: 黑体">类</span> <span style="FONT-FAMILY: 黑体">型</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: 104.25pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="139">
            <p class="a2"><span style="FONT-FAMILY: 黑体">说</span><span lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="FONT-FAMILY: 黑体">明</span></p>
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            <td style="BORDER-RIGHT: medium none; PADDING-RIGHT: 9.9pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 181.55pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="242">
            <p class="a2"><span style="FONT-FAMILY: 黑体">范</span><span lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="FONT-FAMILY: 黑体">围</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 59.8pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="80">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">sbyte</span></p>
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            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">System.SByte</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 104.25pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="139">
            <p class="a4" style="MARGIN-LEFT: 0cm; TEXT-ALIGN: center" align="center"><span lang="EN-US">8</span><span style="FONT-FAMILY: 宋体">位有符号的整数</span></p>
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            <td style="BORDER-RIGHT: medium none; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 181.55pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="242">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">&ndash;128 </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 127 (&ndash;2<sup>7</sup> </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 2<sup>7</sup>&ndash;1)</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 59.8pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="80">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">short</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 94.7pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="126">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">System.Int16</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 104.25pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="139">
            <p class="a4" style="MARGIN-LEFT: 0cm; TEXT-ALIGN: center" align="center"><span lang="EN-US">16</span><span style="FONT-FAMILY: 宋体">位有符号的整数</span></p>
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            <td style="BORDER-RIGHT: medium none; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 181.55pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="242">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">&ndash;32 768 </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 32 767 (&ndash;2<sup>15</sup> </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 2<sup>15</sup>&ndash;1)</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 59.8pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="80">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">int</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 94.7pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="126">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">System.Int32</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 104.25pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="139">
            <p class="a4" style="MARGIN-LEFT: 0cm; TEXT-ALIGN: center" align="center"><span lang="EN-US">32</span><span style="FONT-FAMILY: 宋体">位有符号的整数</span></p>
            </td>
            <td style="BORDER-RIGHT: medium none; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 181.55pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="242">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">&ndash;2 147 483 648 </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 2 147 483 647 (&ndash;2<sup>31</sup> </span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 2<sup>31</sup>&ndash;1)</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 59.8pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="80">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">long</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 94.7pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="126">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">System.Int64</span></p>
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            <td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 104.25pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="139">
            <p class="a4" style="MARGIN-LEFT: 0cm; TEXT-ALIGN: center" align="center"><span lang="EN-US">64</span><span style="FONT-FAMILY: 宋体">位有符号的整数</span></p>
            </td>
            <td style="BORDER-RIGHT: medium none; PADDING-RIGHT: 9.9pt; BORDER-TOP: medium none; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 1.4pt; BORDER-LEFT: medium none; WIDTH: 181.55pt; PADDING-TOP: 1.4pt; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="242">
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">&ndash;9 223 372 036 854 775 808 </span><span style="FONT-FAMILY: 宋体">到</span> </p>
            <p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">9 223 372 036 854 775 807 (&ndash;2<sup>63</sup></span><span style="FONT-FAMILY: 宋体">到</span><span lang="EN-US"> 2<sup>63</sup>&ndash;1)</span></p>
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