Proportional Grid
<UserControl x:Class='SilverlightApplication3.MainPage' 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' mc:Ignorable='d' d:DesignWidth='640' d:DesignHeight='480'> <Grid ShowGridLines="True" Background="White"> <Grid.RowDefinitions> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition></ColumnDefinition> <ColumnDefinition></ColumnDefinition> <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <Button Grid.Row="0" Grid.Column="0" Content="Top Left"></Button> <Button Grid.Row="0" Grid.Column="1" Content="Middle Left"></Button> <Button Grid.Row="1" Grid.Column="2" Content="Bottom Right"></Button> <Button Grid.Row="1" Grid.Column="1" Content="Bottom Middle"></Button> </Grid> </UserControl>