regular expression to replace div : <p>i need regex in c# way to replace following tags:</p>

<p><code>&lt;div class="tr-summaryinfo"&gt;'
&lt;p class="tr-summaryitem"&gt;test &lt;/&gt;
&lt;/div&gt;</code></p>

<p>it should look like</p>

<p><code>&lt;ul class="tr-summaryinfo"&gt;'
&lt;li class="tr-summaryitem"&gt;test &lt;/li&gt;
&lt;/ul&gt;</code></p>

<p>Thank you</p>
