# C1.Framework.ListBoxElement.C1ItemCheckEventArgs.Index

## Content

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<h1 id="C1_Framework_ListBoxElement_C1ItemCheckEventArgs_Index" data-uid="C1.Framework.ListBoxElement.C1ItemCheckEventArgs.Index" class="text-break">Index Field
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<div class="markdown level0 summary"><p>Index of the updated item.</p>
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<div class="markdown level0 conceptual"></div>
<h6><strong>Namespace</strong>: <a class="xref" href="C1.Framework.html">C1.Framework</a></h6>
<h6><strong>Assembly</strong>: C1.Win.10.dll</h6>
<h5 id="C1_Framework_ListBoxElement_C1ItemCheckEventArgs_Index_syntax">Syntax</h5>
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  <pre><code class="lang-csharp hljs">public readonly int Index</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public ReadOnly Index As Integer</code></pre>
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<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.int32">int</a></td>
      <td>Index of the updated item.</td>
    </tr>
  </tbody>
</table>
<h5 id="C1_Framework_ListBoxElement_C1ItemCheckEventArgs_Index_remarks"><strong>Remarks</strong></h5>
<div class="markdown level0 remarks"><p>If -1, <a class="xref" href="C1.Framework.ListBoxElement.CheckAll.html#C1_Framework_ListBoxElement_CheckAll">CheckAll</a> state was changed.</p>
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