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antigravity-skills-reference/skills/avalonia-layout-zafiro/containers.md

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# Semantic Containers
Using the right container for the data type simplifies XAML and improves maintainability. `Zafiro.Avalonia` provides specialized controls for common layout patterns.
## 📦 HeaderedContainer
Prefer `HeaderedContainer` over a `Border` or `Grid` when a section needs a title or header.
```xml
<HeaderedContainer Header="Security Settings" Classes="WizardSection">
<StackPanel>
<!-- Content here -->
</StackPanel>
</HeaderedContainer>
```
### Key Properties:
- `Header`: The content or string for the header.
- `HeaderBackground`: Brush for the header area.
- `ContentPadding`: Padding for the content area.
## ↔️ EdgePanel
Use `EdgePanel` to position elements at the edges of a container without complex `Grid` definitions.
```xml
<EdgePanel StartContent="{Icon fa-wallet}"
Content="Wallet Balance"
EndContent="$1,234.00" />
```
### Slots:
- `StartContent`: Aligned to the left (or beginning).
- `Content`: Fills the remaining space in the middle.
- `EndContent`: Aligned to the right (or end).
## 📇 Card
A simple container for grouping related information, often used inside `HeaderedContainer` or as a standalone element in a list.
```xml
<Card Header="Enter recipient address:">
<TextBox Text="{Binding Address}" />
</Card>
```
## 📐 Best Practices
- Use `Classes` to apply themed variants (e.g., `Classes="Section"`, `Classes="Highlight"`).
- Customize internal parts of the containers using templates in your styles when necessary, rather than nesting more controls.