# C1.Win.Accordion.C1Accordion.PageExpandStateChanging

## Content

<div class="doc-site-dotnet-api-container">




<h1 id="C1_Win_Accordion_C1Accordion_PageExpandStateChanging" data-uid="C1.Win.Accordion.C1Accordion.PageExpandStateChanging" class="text-break">PageExpandStateChanging Event
</h1>
<div class="markdown level0 summary"><p>Occurs when one of <a class="xref" href="C1.Win.Accordion.C1Accordion.Pages.html#C1_Win_Accordion_C1Accordion_Pages">Pages</a> <a class="xref" href="C1.Win.Accordion.C1AccordionPage.IsExpanded.html#C1_Win_Accordion_C1AccordionPage_IsExpanded">IsExpanded</a> property is about to be changed.</p>
</div>
<div class="markdown level0 conceptual"></div>
<h6><strong>Namespace</strong>: <a class="xref" href="C1.Win.Accordion.html">C1.Win.Accordion</a></h6>
<h6><strong>Assembly</strong>: C1.Win.Accordion.10.dll</h6>
<h5 id="C1_Win_Accordion_C1Accordion_PageExpandStateChanging_syntax">Syntax</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public event EventHandler&lt;PageExpandStateChangingEventArgs&gt; PageExpandStateChanging</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Event PageExpandStateChanging As EventHandler(Of PageExpandStateChangingEventArgs)</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.eventhandler-1">EventHandler</a>&lt;<a class="xref" href="C1.Win.Accordion.PageExpandStateChangingEventArgs.html">PageExpandStateChangingEventArgs</a>&gt;</td>
      <td>Occurs when one of   property is about to be changed.</td>
    </tr>
  </tbody>
</table>
</div>