# C1.WPF.Schedule.NullableDateTimePropertyChangeEventArgs.-ctor

## Content

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<h1 id="C1_WPF_Schedule_NullableDateTimePropertyChangeEventArgs__ctor_" data-uid="C1.WPF.Schedule.NullableDateTimePropertyChangeEventArgs.#ctor*">NullableDateTimePropertyChangeEventArgs Constructor
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_WPF_Schedule_NullableDateTimePropertyChangeEventArgs__ctor_" data-uid="C1.WPF.Schedule.NullableDateTimePropertyChangeEventArgs.#ctor*"></a>
<h4 id="C1_WPF_Schedule_NullableDateTimePropertyChangeEventArgs__ctor_System_Windows_RoutedEvent_System_Windows_DependencyProperty_System_Nullable_System_DateTime__System_Nullable_System_DateTime__" data-uid="C1.WPF.Schedule.NullableDateTimePropertyChangeEventArgs.#ctor(System.Windows.RoutedEvent,System.Windows.DependencyProperty,System.Nullable{System.DateTime},System.Nullable{System.DateTime})">NullableDateTimePropertyChangeEventArgs(RoutedEvent, DependencyProperty, DateTime?, DateTime?)</h4>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="C1.WPF.Schedule.DateTimePropertyChangeEventArgs.html">DateTimePropertyChangeEventArgs</a>
class with the specified routed event, dependency property, old and new DateTime value.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public NullableDateTimePropertyChangeEventArgs(RoutedEvent routedEvent, DependencyProperty property, DateTime? oldValue, DateTime? newValue)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Sub New(routedEvent As RoutedEvent, [property] As DependencyProperty, oldValue As Date?, newValue As Date?)</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.windows.routedevent">RoutedEvent</a></td>
      <td><span class="parametername">routedEvent</span></td>
      <td><p>The <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.windows.routedevent">RoutedEvent</a>.</p>
</td>
    </tr>
    <tr>
      <td><span class="xref">DependencyProperty</span></td>
      <td><span class="parametername">property</span></td>
      <td><p>The <span class="xref">System.Windows.DependencyProperty</span>.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a>?</td>
      <td><span class="parametername">oldValue</span></td>
      <td><p>The old value of the specified property.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a>?</td>
      <td><span class="parametername">newValue</span></td>
      <td><p>The new value of the specified property.</p>
</td>
    </tr>
  </tbody>
</table>
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