GTPCorrgir/notificacion.xaml

<Window x:Class="GTPCorrgir.notificacion" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="100" Width="300" Topmost="True"
        ShowInTaskbar="False" WindowStyle="None" AllowsTransparency="True" Background="Transparent">
    <Window.Resources>
        <!-- Animaciones -->
        <Storyboard x:Key="FadeIn">
            <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0.0" To="1.0" Duration="0:0:0.3" />
        </Storyboard>
        <Storyboard x:Key="FadeOut">
            <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1.0" To="0.0" Duration="0:0:0.3" />
        </Storyboard>

        <!-- Estilo del botón de cerrar -->
        <Style x:Key="CloseButtonStyle" TargetType="Button">
            <Setter Property="Background" Value="Transparent" />
            <Setter Property="Foreground" Value="#757575" />
            <Setter Property="BorderThickness" Value="0" />
            <Setter Property="Width" Value="20" />
            <Setter Property="Height" Value="20" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border x:Name="border" Background="{TemplateBinding Background}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="10">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="Background" Value="#20000000" />
                                <Setter Property="Foreground" Value="#FF4081" />
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="border" Property="Background" Value="#40000000" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>

    <Border CornerRadius="10" Background="#AAF0F0F0">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto" />
                <RowDefinition Height="*" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>

            <Grid Grid.Row="0">
                <TextBlock x:Name="TitleText" FontSize="16" FontWeight="Bold" Margin="10,10,30,5" />

                <Button Content="×" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,5,5,0"
                        Style="{StaticResource CloseButtonStyle}" Click="CloseButton_Click" />
            </Grid>

            <TextBlock x:Name="MessageText" Grid.Row="1" FontSize="14" Margin="10,0,10,5" TextWrapping="Wrap" />

            <ProgressBar x:Name="AutoCloseProgress" Grid.Row="2" Height="2" Margin="10,0,10,5" Foreground="#FF4081" />
        </Grid>
    </Border>
</Window>