Shaker/Avalonia/SukiUI/Controls/InfoBar.axaml

<ResourceDictionary xmlns="https://github.com/avaloniaui"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:icons="clr-namespace:SukiUI.Content"
                    xmlns:suki="clr-namespace:SukiUI.Controls">
    <Design.PreviewWith>
        <StackPanel Width="400" Spacing="3">
            <suki:InfoBar Title="Title"
                          IsClosable="True"
                          Message="Long Text Test Long Text Test Long Text Test Long Text Test" />
            <suki:InfoBar Title="Title" Message="Default" />
        </StackPanel>
    </Design.PreviewWith>
    <ControlTheme x:Key="SukiInfoBarStyle" TargetType="suki:InfoBar">
        <Setter Property="MinWidth" Value="200" />
        <Setter Property="Template">
            <ControlTemplate>
                <suki:GlassCard MinWidth="300" IsOpaque="{TemplateBinding IsOpaque}" Padding="0,0,0,15"
                        CornerRadius="10"
                        IsVisible="{TemplateBinding IsOpen}">
                    <Grid ColumnDefinitions="50,*,40">
                        <StackPanel Grid.Column="0"
                                    HorizontalAlignment="Left"
                                    Orientation="Horizontal">
                            <Border Width="20"
                                    Height="20"
                                    Margin="15,15,0,0"
                                    HorizontalAlignment="Left"
                                    VerticalAlignment="Top"
                                    Background="{DynamicResource SukiCardBackground}"
                                    CornerRadius="35">
                                <Border ClipToBounds="True" CornerRadius="35">
                                    <Panel>
                                        <Panel Background="{TemplateBinding IconForeground}" Opacity="1" />
                                        <PathIcon Width="10"
                                                  Height="10"
                                                  Margin="0,0,0,0"
                                                  HorizontalAlignment="Center"
                                                  VerticalAlignment="Center"
                                                  Data="{TemplateBinding Icon}"
                                                  Foreground="White" />
                                    </Panel>
                                </Border>
                            </Border>
                        </StackPanel>

                        <WrapPanel Name="PART_TextPanel"
                                   Grid.Column="1"
                                   Margin="0,12,0,0">
                            <TextBlock Margin="0,5,10,0"
                                       FontWeight="Bold"
                                       Text="{TemplateBinding Title}" />
                            <Border Width="7"></Border>
                            <TextBlock Margin="0,5,0,0"
                                       Text="{TemplateBinding Message}"
                                       TextWrapping="Wrap" />
                        </WrapPanel>

                        <Button Name="PART_CloseButton"
                                Grid.Column="2"
                                Width="27"
                                Height="27"
                                Margin="0,12,12,0"
                                Padding="0"
                                HorizontalAlignment="Right"
                                VerticalAlignment="Top"
                                BorderThickness="0"
                                Classes="Basic Rounded WindowControlsButton Close"
                                IsVisible="{TemplateBinding IsClosable}">
                            <PathIcon Width="10"
                                      Height="10"
                                      Data="{x:Static icons:Icons.WindowClose}"
                                      Opacity="0.7" />
                        </Button>
                    </Grid>
                </suki:GlassCard>
            </ControlTemplate>
        </Setter>
    </ControlTheme>
    <ControlTheme x:Key="{x:Type suki:InfoBar}"
                  BasedOn="{StaticResource SukiInfoBarStyle}"
                  TargetType="suki:InfoBar" />
</ResourceDictionary>