How to set margin between each TileViewItem in TileViewControl?
You can set the margin between each TileViewItems by setting the Margin property in ItemContainerStyle in WPF TileView control. Refer the following code for your reference.
XAML
<!-- Set Margin -->
<Window.Resources>
<Style x:Key="tileViewItemStyle" TargetType="{x:Type syncfusion:TileViewItem}">
<Setter Property="Margin" Value="5,5,5,5" />
</Style>
</Window.Resources>
<!-- TileView -->
<Grid>
<syncfusion:TileViewControl x:Name="tileViewControl" HorizontalAlignment="Stretch" Height="300" Width="300" VerticalAlignment="Stretch" ItemContainerStyle="{StaticResource tileViewItemStyle}">
<syncfusion:TileViewItem Header="Item 1"/>
<syncfusion:TileViewItem Header="Item 2"/>
<syncfusion:TileViewItem Header="Item 3"/>
<syncfusion:TileViewItem Header="Item 4"/>
</syncfusion:TileViewControl>
</Grid>
Screenshot
