Set size of a column.

When set the elements will be arranged in as many columns of size ColumnSize as will fit on the display.

If Orientation is set to Vertical, which is the default, size means width of the column. Otherwise, when Orientation is Horizontal, size means height.

Note that ColumnSize and ColumnCount are exclusive, and should not be set at the same time.

<Panel Color="Black">
    <ColumnLayout ColumnSize="12" />
    <Each Count="150">
        <Circle Margin="1" Width="10" Height="10" Color="Yellow" />
        <Rectangle Margin="1" Width="10" Height="40" Color="Red" />
        <Rectangle Margin="1" CornerRadius="4" Width="10" Height="20"  Color="Teal" />
    </Each>
</Panel>