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doc: update cs.md (#266) cb7b542fb1

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@ -253,6 +253,28 @@
</span><span class="code-line"> <span class="token string">""</span>"<span class="token punctuation">;</span>
</span><span class="code-line">Console<span class="token punctuation">.</span><span class="token function">WriteLine</span><span class="token punctuation">(</span>multiLine<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// => Content begin "Hello World!" /\n&#x3C;>"" end.</span>
</span></code></pre>
<p>###字符串操作</p>
<pre class="language-cs"><code class="language-cs code-highlight"><span class="code-line"><span class="token comment">//字符串分割</span>
</span><span class="code-line"><span class="token class-name"><span class="token keyword">string</span></span> Name <span class="token operator">=</span> <span class="token string">"字A符A串A分A割"</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token class-name"><span class="token keyword">string</span><span class="token punctuation">[</span><span class="token punctuation">]</span></span> Names<span class="token operator">=</span>Name<span class="token punctuation">.</span><span class="token function">Split</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token constructor-invocation class-name"><span class="token keyword">char</span><span class="token punctuation">[</span><span class="token punctuation">]</span></span> <span class="token punctuation">{</span> <span class="token char">'A'</span> <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token comment">//会以A为媒介把字符串分成若干份</span>
</span><span class="code-line"><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name"><span class="token keyword">int</span></span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&#x3C;</span> Names<span class="token punctuation">.</span>Length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span>
</span><span class="code-line"><span class="token punctuation">{</span>
</span><span class="code-line"> Console<span class="token punctuation">.</span><span class="token function">Write</span><span class="token punctuation">(</span>Names<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token punctuation">}</span>
</span><span class="code-line"><span class="token comment">//-----------------------------------</span>
</span><span class="code-line"><span class="token comment">//字符串截取</span>
</span><span class="code-line"><span class="token class-name"><span class="token keyword">string</span></span> Str <span class="token operator">=</span> <span class="token string">"字符串截取"</span><span class="token punctuation">;</span>
</span><span class="code-line">Str <span class="token operator">=</span> Str<span class="token punctuation">.</span><span class="token function">Substring</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line">Console<span class="token punctuation">.</span><span class="token function">WriteLine</span><span class="token punctuation">(</span>Str<span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token comment">//输出结果“串”，意为从第二个下标开始截取一位字符</span>
</span><span class="code-line"><span class="token comment">//-----------------------------------</span>
</span><span class="code-line"><span class="token comment">//字符串替换</span>
</span><span class="code-line"><span class="token class-name"><span class="token keyword">string</span></span> Rep <span class="token operator">=</span> <span class="token string">"字符1替换"</span><span class="token punctuation">;</span>
</span><span class="code-line">Rep <span class="token operator">=</span> Rep<span class="token punctuation">.</span><span class="token function">Replace</span><span class="token punctuation">(</span><span class="token string">"1"</span><span class="token punctuation">,</span> <span class="token string">"串"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line">Console<span class="token punctuation">.</span><span class="token function">WriteLine</span><span class="token punctuation">(</span>Rep<span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token comment">//会把字符中的 “1”替换成“串”</span>
</span></code></pre>
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="杂项"><a aria-hidden="true" tabindex="-1" href="#杂项"><span class="icon icon-link"></span></a>杂项</h2><div class="wrap-body">
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist col-span-3"><div class="wrap-header h3wrap"><h3 id="常用-net-概念"><a aria-hidden="true" tabindex="-1" href="#常用-net-概念"><span class="icon icon-link"></span></a>常用 .NET 概念</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-3-->