Grid with Column Definition and Row definition


   
       
<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Grid" Height="300" Width="300">
    <Grid Background="AliceBlue">
        <Grid.ColumnDefinitions>
            <ColumnDefinition MinWidth="100" MaxWidth="200" />
            <ColumnDefinition MaxWidth="100" />
            <ColumnDefinition Width="50" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="50" />
            <RowDefinition MinHeight="100" />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Ellipse Grid.Row="0" Grid.Column="0" Fill="BlanchedAlmond" Stroke="Black" />
        <Ellipse Grid.Row="0" Grid.Column="1" Fill="BurlyWood"  Stroke="Black" />
        <Ellipse Grid.Row="0" Grid.Column="2" Fill="Red" Stroke="Black" />
        <Ellipse Grid.Row="0" Grid.Column="3" Fill="BurlyWood" Stroke="Black" />
        <Ellipse Grid.Row="1" Grid.Column="0" Fill="BurlyWood" Stroke="Black" />
        <Ellipse Grid.Row="1" Grid.Column="1" Fill="Red" Stroke="Black" />
        <Ellipse Grid.Row="1" Grid.Column="2" Fill="BurlyWood" Stroke="Black" />
        <Ellipse Grid.Row="1" Grid.Column="3" Fill="BlanchedAlmond" Stroke="Black" />
        <Ellipse Grid.Row="2" Grid.Column="0" Fill="BlanchedAlmond" Stroke="Black" />
        <Ellipse Grid.Row="2" Grid.Column="1" Fill="Red"  Stroke="Black" />
        <Ellipse Grid.Row="2" Grid.Column="2" Fill="BlanchedAlmond" Stroke="Black" />
        <Ellipse Grid.Row="2" Grid.Column="3" Fill="BurlyWood" Stroke="Black" />
        <Ellipse Grid.Row="2" Grid.Column="2" Grid.ColumnSpan="2" Fill="Gold"  Stroke="Black" Height="50"/>
    </Grid>
</Window>