# C1.Win.C1DynamicHelp.TopicMap.Item

## Content

<div class="doc-site-dotnet-api-container">



<h1 id="C1_Win_C1DynamicHelp_TopicMap_Item_" data-uid="C1.Win.C1DynamicHelp.TopicMap.Item*">this Property
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Win_C1DynamicHelp_TopicMap_Item_" data-uid="C1.Win.C1DynamicHelp.TopicMap.Item*"></a>
<h4 id="C1_Win_C1DynamicHelp_TopicMap_Item_System_Object_" data-uid="C1.Win.C1DynamicHelp.TopicMap.Item(System.Object)">this[object]</h4>
<div class="markdown level1 summary"><p>Gets or sets the value associated with the specified key.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public MapItem this[object uiElement] { get; set; }</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Default Property Item(uiElement As Object) As MapItem</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="https://learn.microsoft.com/dotnet/api/system.object">object</a></td>
      <td><span class="parametername">uiElement</span></td>
      <td><p>The UI element of the value to get or set.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.Win.C1DynamicHelp.MapItem.html">MapItem</a></td>
      <td><p>The value associated with the specified key. If the specified key is not
found, a get operation throws a <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.keynotfoundexception">KeyNotFoundException</a>,
and a set operation creates a new element with the specified key.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 class="exceptions">Exceptions</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Condition</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.keynotfoundexception">KeyNotFoundException</a></td>
      <td><p>The property is retrieved and key does not exist in the collection.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentnullexception">ArgumentNullException</a></td>
      <td><p>key is null.</p>
</td>
    </tr>
  </tbody>
</table>
</div>