# C1.WPF.C1NumericBox.AllowNull

## Content

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<h1 id="C1_WPF_C1NumericBox_AllowNull_" data-uid="C1.WPF.C1NumericBox.AllowNull*">AllowNull Property
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<a id="C1_WPF_C1NumericBox_AllowNull_" data-uid="C1.WPF.C1NumericBox.AllowNull*"></a>
<h4 id="C1_WPF_C1NumericBox_AllowNull" data-uid="C1.WPF.C1NumericBox.AllowNull">AllowNull</h4>
<div class="markdown level1 summary"><p>Gets or sets whether the user can enter nulls values.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public bool AllowNull { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Property AllowNull As Boolean</code></pre>
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<h5 id="C1_WPF_C1NumericBox_AllowNull_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>Null values are encoded in the <b>Value</b> property as <b>double.NaN</b>.</p>
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