make columns in WPF code example

Example: wpf grid

<Window x:Class="WpfTutorialSamples.Panels.TabularGrid"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="TabularGrid" Height="300" Width="300">
    <Grid>
		<Grid.ColumnDefinitions>
			<ColumnDefinition Width="2*" />
			<ColumnDefinition Width="1*" />
			<ColumnDefinition Width="1*" />
		</Grid.ColumnDefinitions>
		<Grid.RowDefinitions>
			<RowDefinition Height="2*" />
			<RowDefinition Height="1*" />
			<RowDefinition Height="1*" />
		</Grid.RowDefinitions>
	</Grid>
</Window>