# C1.C1Preview.RenderInputRadioButton.GroupIndex

## Content

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<h1 id="C1_C1Preview_RenderInputRadioButton_GroupIndex_" data-uid="C1.C1Preview.RenderInputRadioButton.GroupIndex*">GroupIndex Property
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<a id="C1_C1Preview_RenderInputRadioButton_GroupIndex_" data-uid="C1.C1Preview.RenderInputRadioButton.GroupIndex*"></a>
<h4 id="C1_C1Preview_RenderInputRadioButton_GroupIndex" data-uid="C1.C1Preview.RenderInputRadioButton.GroupIndex">GroupIndex</h4>
<div class="markdown level1 summary"><p>Gets or sets the group index of the current radio button.
Only one radio button in a group can be checked at any time.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public int GroupIndex { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Property GroupIndex As Integer</code></pre>
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<h5 id="C1_C1Preview_RenderInputRadioButton_GroupIndex_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>By default, all <a class="xref" href="C1.C1Preview.RenderInputRadioButton.html">RenderInputRadioButton</a> objects are placed in
a single group with the <b>GroupIndex</b> set to <b>-1</b>.</p>
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