# C1.Win.FlexGrid.ValidationRuleCollection.IndexOf

## Content

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<h1 id="C1_Win_FlexGrid_ValidationRuleCollection_IndexOf_" data-uid="C1.Win.FlexGrid.ValidationRuleCollection.IndexOf*">IndexOf Method
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<div class="markdown level0 conceptual"></div>



<a id="C1_Win_FlexGrid_ValidationRuleCollection_IndexOf_" data-uid="C1.Win.FlexGrid.ValidationRuleCollection.IndexOf*"></a>
<h4 id="C1_Win_FlexGrid_ValidationRuleCollection_IndexOf_C1_Win_FlexGrid_ValidationRule_" data-uid="C1.Win.FlexGrid.ValidationRuleCollection.IndexOf(C1.Win.FlexGrid.ValidationRule)">IndexOf(ValidationRule)</h4>
<div class="markdown level1 summary"><p>Determines the index of a specific <a class="xref" href="C1.Win.FlexGrid.ValidationRule.html">ValidationRule</a>&gt; in the <a class="xref" href="C1.Win.FlexGrid.ValidationRuleCollection.html">ValidationRuleCollection</a>.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public int IndexOf(ValidationRule item)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Function IndexOf(item As ValidationRule) As Integer</code></pre>
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<h5 class="parameters">Parameters</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.Win.FlexGrid.ValidationRule.html">ValidationRule</a></td>
      <td><span class="parametername">item</span></td>
      <td><p>The object to locate in the <a class="xref" href="C1.Win.FlexGrid.ValidationRuleCollection.html">ValidationRuleCollection</a>.</p>
</td>
    </tr>
  </tbody>
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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><p>The index of <code class="paramref">item</code> if found in the list; otherwise, -1.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 class="implements">Implements</h5>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1.indexof">IList&lt;T&gt;.IndexOf(T)</a></div>
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