# C1.C1Preview.RenderObject.OnChildAdd

## Content

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<h1 id="C1_C1Preview_RenderObject_OnChildAdd_" data-uid="C1.C1Preview.RenderObject.OnChildAdd*">OnChildAdd Method
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<div class="markdown level0 conceptual"></div>



<a id="C1_C1Preview_RenderObject_OnChildAdd_" data-uid="C1.C1Preview.RenderObject.OnChildAdd*"></a>
<h4 id="C1_C1Preview_RenderObject_OnChildAdd_C1_C1Preview_RenderObject_" data-uid="C1.C1Preview.RenderObject.OnChildAdd(C1.C1Preview.RenderObject)">OnChildAdd(RenderObject)</h4>
<div class="markdown level1 summary"><p>Called after adding new child RenderObject object to the Children collection.
User can throw exception if this object can't be added as the child for this object.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">protected virtual void OnChildAdd(RenderObject child)</code></pre>
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  <pre><code class="lang-vbnet hljs">Protected Overridable Sub OnChildAdd(child As RenderObject)</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.C1Preview.RenderObject.html">RenderObject</a></td>
      <td><span class="parametername">child</span></td>
      <td><p>Child RenderObject object.</p>
</td>
    </tr>
  </tbody>
</table>
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