<Grid x:Name="LayoutRoot" Background="{StaticResource BaseColor}">
         <Grid.ColumnDefinitions>
            <ColumnDefinition Width="246" MinWidth="246" />
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="0.079*"/>
            <RowDefinition Height="0.446*"/>
            <RowDefinition Height="0.475*"/>
        </Grid.RowDefinitions>

 <sdk:GridSplitter x:Name="grsplSplitter" Grid.Row="1"  Grid.RowSpan="2" Grid.Column="1" VerticalAlignment="Stretch" HorizontalAlignment="Left" 
                          Background="{StaticResource BaseColor}"  Width="5"/>
    </Grid>