# C1.Win.C1DynamicHelp.TopicMap.HasChanges

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<h1 id="C1_Win_C1DynamicHelp_TopicMap_HasChanges_" data-uid="C1.Win.C1DynamicHelp.TopicMap.HasChanges*">HasChanges Property
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<h4 id="C1_Win_C1DynamicHelp_TopicMap_HasChanges" data-uid="C1.Win.C1DynamicHelp.TopicMap.HasChanges">HasChanges</h4>
<div class="markdown level1 summary"><p>Gets a value that determines whether the <a class="xref" href="C1.Win.C1DynamicHelp.TopicMap.html">TopicMap</a> has changed since it was initialized (read from an XML file).</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public bool HasChanges { get; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public ReadOnly Property HasChanges As Boolean</code></pre>
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<h5 id="C1_Win_C1DynamicHelp_TopicMap_HasChanges_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>This property is typically used in authoring mode, to check whether the TopicMap has changed and should therefore be saved 
before the application closes.</p>
<p>It will return <i>false</i> if authoring mode is not used, unless the application changes the map programmatically.</p>
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