Public ReadOnly Property TimeExtent As TimeExtent

public TimeExtent TimeExtent {get;}

<Grid x:Name="LayoutRoot">
  
  <!-- Add a Map Control and set the initial extent to geographic area of Japan. -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="0,162,0,0" Name="Map1" 
        VerticalAlignment="Top" Height="318" Width="311" 
        TimeExtent="{Binding ElementName=MyTimeSlider, Path=Value}"
        Extent="14328024,3407052,17104629,5996380">
  
    <!-- Add a backdrop ArcGISTiledMapServiceLayer for reference. -->
    <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" 
          Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" />
    
    <!-- 
    Add an ArcGISDynamicMapServiceLayer that has temopral data enabled (i.e. it has TimeExtent information).
    Don't display any features in the ArcGISDynamicMapServiceLayer (i.e. Visible=False until the TimeSlider 
    is fully initialized via the user clicking the Button and executing the code-behind logic.
    -->
    <esri:ArcGISDynamicMapServiceLayer ID="EarthquakesSince1970" Visible="False"
          Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer"/>
    
  </esri:Map>
  
  <!-- 
  Add a TimeSlider to control the display of what geographic features are displayed in the Map Control
  based upon a specified TimeExtent. In the case of this sample code, when the specific features of the
  ArcGISDynamicMapServiceLayer have a TimeExtent that falls within the Map.TimeExtent will they be 
  displayed based upon the MyTimeSlider settings.
  -->
  <esri:TimeSlider x:Name="MyTimeSlider" Loop="True" PlaySpeed="0:0:0.1"
        TimeMode="CumulativeFromStart" Height="22" Margin="0,134,0,0" 
        HorizontalAlignment="Left" VerticalAlignment="Top" Width="311" />
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="69" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="455" 
             TextWrapping="Wrap" Margin="12,12,0,0" 
             Text="Click the button to initialize the TimeSlider functions (play, pause, forward, back) 
             to display features in the ArcGISDynamicMapServiceLayer with TimeExtent Properties set." />
  
  <!-- Add a button to perform the work. -->
  <Button Content="Initialize the TimeSlider" Height="23" HorizontalAlignment="Left" 
          Margin="0,105,0,0" Name="Button1" VerticalAlignment="Top" Width="311" Click="Button1_Click"/>
  
</Grid>

private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // This function sets up TimeSlider Intervals that define the tic marks along the TimeSlider track. Intervals 
  // are a Collection of IEnumerable(Of Date) objects. When the TimeSlider.Intervals Property is set along with 
  // the other necessary TimeSlider Properties, the full functionality of the TimeSlider is enabled. This full 
  // functionality includes buttons for Play, Pause, Forward, and Back.
  
  // Get the ArcGISDynamicMapServiceLayer.  
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer myArcGISDynamicMapServiceLayer = null;
  myArcGISDynamicMapServiceLayer = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)(Map1.Layers["EarthquakesSince1970"]);
  
  // Get the TimeExtent from the ArcGISDynamicMapServiceLayer.
  ESRI.ArcGIS.Client.TimeExtent myTimeExtent = myArcGISDynamicMapServiceLayer.TimeExtent;
  
  // Make sure we have valid ArcGISDynamicMapServiceLayer.TimeExtent information before trying to set up the TimeSlider.
  if (myTimeExtent != null)
  {
    // Get the Start (Minimum) and End (Maximum) dates from the ArcGISDyamicMapServiceLayer.TimeExtent.
    DateTime myMinimumDate = myTimeExtent.Start;
    DateTime myMaximumDate = myTimeExtent.End;
    
    // Set the TimeSlider .MinimumValue and MaximumValue Properties.
    MyTimeSlider.MinimumValue = myMinimumDate;
    MyTimeSlider.MaximumValue = myMaximumDate;
    
    // Create a new TimeExtent based on a single instance of time for the TimeSlider.Value Property.
    ESRI.ArcGIS.Client.TimeExtent valueTimeExtent = new ESRI.ArcGIS.Client.TimeExtent(myMinimumDate);
    MyTimeSlider.Value = valueTimeExtent;
    
    // Enable features to be shown in the ArcGISDynamicMapServiceLayer.
    myArcGISDynamicMapServiceLayer.Visible = true;
    
    // Create a new TimeSpan (1 year (i.e. 365 days) in our case).
    TimeSpan myTimeSpan = new TimeSpan(365, 0, 0, 0);
    
    // Create an empty Collection of IEnumerable(Of Date) objects.
    System.Collections.Generic.IEnumerable<DateTime> myIEnumerableDates = null;
    
    // Load all of Dates into the Collection of IEnumerable(Of Date) objects using the 
    // TimeSlider.CreateTimeStopsByTimeInterval Shared/Static function.
    myIEnumerableDates = ESRI.ArcGIS.Client.Toolkit.TimeSlider.CreateTimeStopsByTimeInterval(myTimeExtent, myTimeSpan);
    
    // Set the TimeSlider.Intervals which define the tic marks along the TimSlider track to the IEnumerable(Of Date) 
    // objects.
    MyTimeSlider.Intervals = myIEnumerableDates;
  }
}

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' This function sets up TimeSlider Intervals that define the tic marks along the TimeSlider track. Intervals 
  ' are a Collection of IEnumerable(Of Date) objects. When the TimeSlider.Intervals Property is set along with 
  ' the other necessary TimeSlider Properties, the full functionality of the TimeSlider is enabled. This full 
  ' functionality includes buttons for Play, Pause, Forward, and Back.
  
  ' Get the ArcGISDynamicMapServiceLayer.  
  Dim myArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer
  myArcGISDynamicMapServiceLayer = CType(Map1.Layers("EarthquakesSince1970"), ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
  
  ' Get the TimeExtent from the ArcGISDynamicMapServiceLayer.
  Dim myTimeExtent As ESRI.ArcGIS.Client.TimeExtent = myArcGISDynamicMapServiceLayer.TimeExtent
  
  ' Make sure we have valid ArcGISDynamicMapServiceLayer.TimeExtent information before trying to set up the TimeSlider.
  If myTimeExtent IsNot Nothing Then
    
    ' Get the Start (Minimum) and End (Maximum) dates from the ArcGISDyamicMapServiceLayer.TimeExtent.
    Dim myMinimumDate As Date = myTimeExtent.Start
    Dim myMaximumDate As Date = myTimeExtent.End
    
    ' Set the TimeSlider .MinimumValue and MaximumValue Properties.
    MyTimeSlider.MinimumValue = myMinimumDate
    MyTimeSlider.MaximumValue = myMaximumDate
    
    ' Create a new TimeExtent based on a single instance of time for the TimeSlider.Value Property.
    Dim valueTimeExtent As New ESRI.ArcGIS.Client.TimeExtent(myMinimumDate)
    MyTimeSlider.Value = valueTimeExtent
    
    ' Enable features to be shown in the ArcGISDynamicMapServiceLayer.
    myArcGISDynamicMapServiceLayer.Visible = True
    
    ' Create a new TimeSpan (1 year (i.e. 365 days) in our case).
    Dim myTimeSpan As New TimeSpan(365, 0, 0, 0)
    
    ' Create an empty Collection of IEnumerable(Of Date) objects.
    Dim myIEnumerableDates As System.Collections.Generic.IEnumerable(Of Date)
    
    ' Load all of Dates into the Collection of IEnumerable(Of Date) objects using the 
    ' TimeSlider.CreateTimeStopsByTimeInterval Shared/Static function.
    myIEnumerableDates = ESRI.ArcGIS.Client.Toolkit.TimeSlider.CreateTimeStopsByTimeInterval(myTimeExtent, myTimeSpan)
    
    ' Set the TimeSlider.Intervals which define the tic marks along the TimSlider track to the IEnumerable(Of Date) 
    ' objects.
    MyTimeSlider.Intervals = myIEnumerableDates
    
  End If
  
End Sub