# C1.WPF.DataFilter.ConditionalFilter.DefaultFilterOperation

## Content

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<h1 id="C1_WPF_DataFilter_ConditionalFilter_DefaultFilterOperation_" data-uid="C1.WPF.DataFilter.ConditionalFilter.DefaultFilterOperation*">DefaultFilterOperation Property
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<a id="C1_WPF_DataFilter_ConditionalFilter_DefaultFilterOperation_" data-uid="C1.WPF.DataFilter.ConditionalFilter.DefaultFilterOperation*"></a>
<h4 id="C1_WPF_DataFilter_ConditionalFilter_DefaultFilterOperation" data-uid="C1.WPF.DataFilter.ConditionalFilter.DefaultFilterOperation">DefaultFilterOperation</h4>
<div class="markdown level1 summary"><p>Gets or sets the value of <span class="xref">C1.DataCollection.FilterOperation</span>, which is used as the default value for a newly added expression. The default value is <span class="xref">C1.DataCollection.FilterOperation.Equal</span>.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public virtual FilterOperation DefaultFilterOperation { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Overridable Property DefaultFilterOperation As FilterOperation</code></pre>
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<h5 class="exceptions">Exceptions</h5>
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      <th>Type</th>
      <th>Condition</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.invalidoperationexception">InvalidOperationException</a></td>
      <td><p>The specified <span class="xref">C1.DataCollection.FilterOperation</span> is not supported by the filter.</p>
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