columnaDefinition WPF

		<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>
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