# C1.WPF.Maps.IMapVirtualSource

## Content

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  <h1 id="C1_WPF_Maps_IMapVirtualSource" data-uid="C1.WPF.Maps.IMapVirtualSource" class="text-break">IMapVirtualSource Interface
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  <div class="markdown level0 summary"><p>Interface implemented by items sources for <a class="xref" href="C1.WPF.Maps.MapVirtualLayer.html">MapVirtualLayer</a>.</p>
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  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="C1.WPF.Maps.html">C1.WPF.Maps</a></h6>
  <h6><strong>Assembly</strong>: C1.WPF.Maps.dll</h6>
  <h5 id="C1_WPF_Maps_IMapVirtualSource_syntax">Syntax</h5>
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    <pre><code class="lang-csharp hljs">public interface IMapVirtualSource</code></pre>
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  <div class="codewrapper">
    <pre><code class="lang-vbnet hljs">Public Interface IMapVirtualSource</code></pre>
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  <h3 id="methods">Methods
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    <thead>
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        <th>Name</th>
        <th>Description</th>
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        <td id="C1_WPF_Maps_IMapVirtualSource_Request_System_Double_System_Double_System_Windows_Point_System_Windows_Point_System_Action_System_Collections_ICollection__" data-uid="C1.WPF.Maps.IMapVirtualSource.Request(System.Double,System.Double,System.Windows.Point,System.Windows.Point,System.Action{System.Collections.ICollection})">
          <a class="xref" href="C1.WPF.Maps.IMapVirtualSource.Request.html#C1_WPF_Maps_IMapVirtualSource_Request_System_Double_System_Double_System_Windows_Point_System_Windows_Point_System_Action_System_Collections_ICollection__">Request(double, double, Point, Point, Action&lt;ICollection&gt;)</a>
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        <td class="markdown level1 summary"><p>Called from <a class="xref" href="C1.WPF.Maps.MapVirtualLayer.html">MapVirtualLayer</a> when new items are needed for a map region.</p>
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      </tr>
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