[WPF]WrapPanel

<Window x:Class="WpfApp7.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp7"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <WrapPanel Name="wp1" VerticalAlignment="Top">
            <Rectangle Name="rt1" Width="50" Height="50" Stroke="Black" Fill="AliceBlue"/>
            <Rectangle Name="rt2" Width="50" Height="50" Stroke="Black" Fill="Beige"/>
            <Rectangle Name="rt3" Width="50" Height="50" Stroke="Black" Fill="CadetBlue"/>
            <Rectangle Name="rt4" Width="50" Height="50" Stroke="Black" Fill="DarkBlue"/>
            <Rectangle Name="rt5" Width="50" Height="50" Stroke="Black" Fill="Firebrick"/>
        </WrapPanel>
    </Grid>
</Window>