<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="VerticalWrapPanelWindow" Height="300" Width="300">
<WrapPanel Orientation="Vertical">
<Button Width="30">A</Button>
<Button Width="30">B</Button>
<Button Width="30">C</Button>
<Button Width="30">D</Button>
<Button Width="30">E</Button>
<Button Width="30">F</Button>
<Button Width="30">G</Button>
<Button Width="30">H</Button>
<Button Width="30">I</Button>
<Button Width="30">J</Button>
<Button Width="30">K</Button>
<Button Width="30">L</Button>
<Button Width="30">M</Button>
<Button Width="30">N</Button>
<Button Width="30">O</Button>
<Button Width="30">P</Button>
</WrapPanel>
</Window>
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