MaterialDesignInXamlToolkit Dialog Boxes do not closed by pressing the ENTER key
<p>I am using MaterialDesignInXamlToolkit for WPF. I am trying to close Dialogs by pressing the ENTIRE key.</p>

<p>Here is my DialogHost:</p>

<pre><code>&lt;materialDesign:DialogHost x:Name="dialog_CONNECT"
                                               Grid.Column="0"
                                               HorizontalAlignment="Stretch"
                                               VerticalAlignment="Center"&gt;
                        &lt;materialDesign:DialogHost.DialogContent&gt;
                            &lt;StackPanel Margin="16"&gt;
                                &lt;TextBlock x:Name="textBlock_CONNECTED_DIALOG" /&gt;
                                &lt;StackPanel Orientation="Horizontal" HorizontalAlignment="Center" &gt;
                                    &lt;Button Style="{StaticResource MaterialDesignFlatButton}"
                                            **IsDefault="True"**
                                            Margin="0 8 8 0"
                                            Content="OK"
                                            Command="materialDesign:DialogHost.CloseDialogCommand"/&gt;

                                &lt;/StackPanel&gt;
                            &lt;/StackPanel&gt;
                        &lt;/materialDesign:DialogHost.DialogContent&gt;

                        &lt;Button x:Name="button_CONNECT" Content="CONNECT"
                                Style="{StaticResource MaterialDesignRaisedDarkButton}"  
                                Grid.Column="0"
                                IsDefault="True"
                                Margin="8 0 0 0"
                                VerticalAlignment="Center"
                                Click="onClickConnect"/&gt;

                    &lt;/materialDesign:DialogHost&gt;
</code></pre>

<p>In the code-behind I provide to open the dialog when I click on <em>button_CONNECT</em> (setting dialog_CONNECT.IsOpen = true).</p>

<p>Why if I now press the ENTIRE key the dialog box does not close? </p>