WPF datagrid row alternate color

gistfile1.txt

<Style TargetType="{x:Type DataGrid}">
        <Setter Property="Background" Value="#FFF" />
        <Setter Property="AlternationCount" Value="2" />
</Style>  

<Style TargetType="{x:Type DataGridRow}">
    <Style.Triggers>                 
        <Trigger Property="ItemsControl.AlternationIndex" Value="0">
            <Setter Property="Background" Value="#EFEFEF"></Setter>
        </Trigger>
        <Trigger Property="ItemsControl.AlternationIndex" Value="1">
            <Setter Property="Background" Value="#FFF"></Setter>
        </Trigger>
        <Trigger Property="IsMouseOver" Value="True">
            <Setter Property="Background" Value="LightBlue" />
        </Trigger>
    </Style.Triggers>
</Style>