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<P style="TEXT-INDENT: 2em">TimeSpan elapsedTime; </P>
<P style="TEXT-INDENT: 2em">string strSub; </P>
<P style="TEXT-INDENT: 2em">string strWhole = ""; </P>
<P style="TEXT-INDENT: 2em">// 首先执行字符串连接操作 </P>
<P style="TEXT-INDENT: 2em">startTime = DateTime.Now; </P>
<P style="TEXT-INDENT: 2em">for (int i=0; i &amp;lt; intLimit; i++) </P>
<P style="TEXT-INDENT: 2em">{ </P>
<P style="TEXT-INDENT: 2em">strSub = i.ToString(); </P>
<P style="TEXT-INDENT: 2em">strWhole = strWhole + " " + strSub; </P>
<P style="TEXT-INDENT: 2em">} </P>
<P style="TEXT-INDENT: 2em">endTime = DateTime.Now; </P>
<P style="TEXT-INDENT: 2em">elapsedTime = endTime - startTime; </P>
<P style="TEXT-INDENT: 2em">lblConcat.Text = elapsedTime.ToString(); </P>
<P style="TEXT-INDENT: 2em">// lblConcatString.Text = strWhole; </P>
<P style="TEXT-INDENT: 2em">// 使用stringBuilder类进行同样的操作 </P>
<P style="TEXT-INDENT: 2em">startTime = DateTime.Now; </P>
<P style="TEXT-INDENT: 2em">StringBuilder sb = new StringBuilder(); </P>
<P style="TEXT-INDENT: 2em">for (int i=0; i &amp;lt; intLimit; i++) </P>
<P style="TEXT-INDENT: 2em">{ </P>
<P style="TEXT-INDENT: 2em">strSub = i.ToString(); </P>
<P style="TEXT-INDENT: 2em">sb.Append(" "); </P>
<P style="TEXT-INDENT: 2em">sb.Append(strSub); </P>
<P style="TEXT-INDENT: 2em">} </P>
<P style="TEXT-INDENT: 2em">endTime = DateTime.Now; </P>
<P style="TEXT-INDENT: 2em">elapsedTime = endTime - startTime; </P>
<P style="TEXT-INDENT: 2em">lblBuild.Text = elapsedTime.ToString(); </P>
<P style="TEXT-INDENT: 2em">// lblBuildString.Text = sb.ToString(); </P>
<P style="TEXT-INDENT: 2em">} </P>
<P style="TEXT-INDENT: 2em">&amp;lt;/script&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;html&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;body&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;form runat="server"&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;h1&amp;gt;String Concatenation Benchmark&amp;lt;/h1&amp;gt; </P>
<P style="TEXT-INDENT: 2em">Concatenation: </P>
<P style="TEXT-INDENT: 2em">&amp;lt;asp:Label </P>
<P style="TEXT-INDENT: 2em">id="lblConcat" </P>
<P style="TEXT-INDENT: 2em">runat="server"/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;br/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;asp:Label </P>
<P style="TEXT-INDENT: 2em">id="lblConcatString" </P>
<P style="TEXT-INDENT: 2em">runat="server"/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;br/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;br/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">StringBuilder: </P>
<P style="TEXT-INDENT: 2em">&amp;lt;asp:Label </P>
<P style="TEXT-INDENT: 2em">id="lblBuild" </P>
<P style="TEXT-INDENT: 2em">runat="server"/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;br/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;asp:Label </P>
<P style="TEXT-INDENT: 2em">id="lblBuildString" </P>
<P style="TEXT-INDENT: 2em">runat="server"/&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;/form&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;/body&amp;gt; </P>
<P style="TEXT-INDENT: 2em">&amp;lt;/html&amp;gt; </P>
<P style="TEXT-INDENT: 2em">二种方式的差别是相当大的：使用StringBuilder类的Append方法的速度比使用字符串连接的速度快近200倍。</P>

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