Развертывание окна при запуске… (Дизайн WPF)

Доброе время суток, уважаемые пользователи, прошу помочь! Как на C# WPF на EventTrigger сделать что бы, не кнопка так разворачивалась, а окно сама? Я хочу что бы, при запуски моего приложение, окно открывалась вот в таком ввиде как на ... (Код для кнопки ниже)

 <Window.Resources>
        <Style TargetType="Button">
            <Style.Setters>
                <Setter Property="Button.Background" Value="Black" />
                <Setter Property="Button.Foreground" Value="White" />
                <Setter Property="Button.FontFamily" Value="Verdana" />
                <Setter Property="Button.Margin" Value="2" />
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ButtonBase}">
                            <Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                                <ContentPresenter x:Name="contentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </Border>
                            <ControlTemplate.Triggers>
                                <Trigger Property="Button.IsDefaulted" Value="True">
                                    <Setter Property="BorderBrush" TargetName="border" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                                </Trigger>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <!--Вот здесь нужно изменить цвет, я поставил черный с 80% заливкой-->
                                    <Setter Property="Background" TargetName="border" Value="#CC000000"/>
                                    <Setter Property="BorderBrush" TargetName="border" Value="#FF3C7FB1"/>
                                </Trigger>
                                <Trigger Property="IsPressed" Value="True">
                                    <Setter Property="Background" TargetName="border" Value="#FFC4E5F6"/>
                                    <Setter Property="BorderBrush" TargetName="border" Value="#FF2C628B"/>
                                </Trigger>
                                <Trigger Property="ToggleButton.IsChecked" Value="True">
                                    <Setter Property="Background" TargetName="border" Value="#FFBCDDEE"/>
                                    <Setter Property="BorderBrush" TargetName="border" Value="#FF245A83"/>
                                </Trigger>
                                <Trigger Property="IsEnabled" Value="False">
                                    <Setter Property="Background" TargetName="border" Value="#FFF4F4F4"/>
                                    <Setter Property="BorderBrush" TargetName="border" Value="#FFADB2B5"/>
                                    <Setter Property="TextElement.Foreground" TargetName="contentPresenter" Value="#FF838383"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style.Setters>
            <Style.Triggers>
                <EventTrigger RoutedEvent="Mouse.MouseEnter">
                    <EventTrigger.Actions>
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation Storyboard.TargetProperty="Width" Duration="0:0:1" To="500" AutoReverse="False" />
                                <DoubleAnimation Storyboard.TargetProperty="Height" Duration="0:0:2" To="600" AutoReverse="False" />
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger.Actions>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
    <StackPanel Background="White" >
        <Button x:Name="button1" Width="100" Height="30" Content="Кнопка 1"/>
    </StackPanel>
</Window>