how to write the styles in silverlight

<ResourceDictionary
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
    xmlns:water="clr-namespace:Microsoft.Windows.Controls;assembly=Microsoft.Windows.Controls.WatermarkedTextBox"
    >

    <!-- ******MAIN PAGE STYLES****** -->
    <!-- **************************** -->
    <!-- Primary Color Brushes -->
    <SolidColorBrush x:Key="NavigationBackgroundColorBrush" Color="#FF484848"/>
    <SolidColorBrush x:Key="NavigationForegroundColorBrush" Color="#FFFFFFFF"/>
    <SolidColorBrush x:Key="HighLightColorBrush" Color="#FF0097FC"/>
    <SolidColorBrush x:Key="HoverHyperlinkForegroundColorBrush" Color="#FFEBF7FF"/>
    <SolidColorBrush x:Key="HoverHyperLinkBackgroundColorBrush" Color="#FF747474"/>
    <SolidColorBrush x:Key="BodyTextColorBrush" Color="#FF313131"/>


    <!-- LayoutRoot Grid Style -->
    <Style x:Key="LayoutRootGridStyle" TargetType="Grid">
        <Setter Property="Background" Value="#FFFFFFFF"/>
    </Style>

    <!-- Content Border Style -->
    <Style x:Key="ContentBorderStyle" TargetType="Border">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="#FFFFFFFF"/>
        <Setter Property="BorderThickness" Value="0,0,0,0"/>
        <Setter Property="Margin" Value="0,33,0,0"/>
        <Setter Property="VerticalAlignment" Value="Stretch"/>
        <Setter Property="HorizontalAlignment" Value="Stretch"/>
    </Style>

    <!-- Content Frame Style -->
    <Style x:Key="ContentFrameStyle" TargetType="navigation:Frame">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="Padding" Value="0,0,0,0"/>

    </Style>

    <!-- Navigation Grid Style -->
    <Style x:Key="NavigationGridStyle" TargetType="Grid">
        <Setter Property="Background" Value="{StaticResource NavigationBackgroundColorBrush}"/>
        <Setter Property="Height" Value="42"/>
        <Setter Property="Margin" Value="0"/>
        <Setter Property="VerticalAlignment" Value="Top"/>
    </Style>

    <!-- Branding Border Style -->
    <Style x:Key="BrandingBorderStyle" TargetType="Border">
        <Setter Property="Height" Value="42"/>
        <Setter Property="Margin" Value="25,0,25,0"/>
        <Setter Property="VerticalAlignment" Value="Top"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
    </Style>



    <!-- Links Border Style -->
    <Style x:Key="LinksBorderStyle" TargetType="Border">
        <Setter Property="Height" Value="42"/>
        <Setter Property="Margin" Value="25,0,5,0"/>
        <Setter Property="HorizontalAlignment" Value="Right"/>
    </Style>



    <!-- ******CONTENT PAGE STYLES****** -->
    <!-- ******************************* -->
    <!-- Page Style -->
    <Style x:Key="PageStyle" TargetType="navigation:Page"/>

    <!-- Page ScrollViewer Style -->
    <Style x:Key="PageScrollViewerStyle" TargetType="ScrollViewer">
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0,1,0,1"/>
        <Setter Property="Margin" Value="-58,-15,-58,-15"/>
        <Setter Property="Padding" Value="58,0,58,0"/>
        <Setter Property="VerticalScrollBarVisibility" Value="Auto"/>
        <Setter Property="HorizontalScrollBarVisibility" Value="Auto"/>
    </Style>

    <!-- Content Panel Style -->
    <Style x:Key="ContentPanelStyle" TargetType="StackPanel"/>

    <!-- Header Text Style -->
    <Style x:Key="HeaderTextStyle" TargetType="TextBlock">
        <Setter Property="Foreground" Value="{StaticResource BodyTextColorBrush}"/>
        <Setter Property="FontSize" Value="15"/>
        <Setter Property="FontWeight" Value="Bold"/>
        <Setter Property="TextWrapping" Value="Wrap"/>
        <Setter Property="Margin" Value="0,15,0,4"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
    </Style>

    <!-- Content Text Style -->
    <Style x:Key="ContentTextStyle" TargetType="TextBlock">
        <Setter Property="Foreground" Value="{StaticResource BodyTextColorBrush}"/>
        <Setter Property="FontSize" Value="12"/>
        <Setter Property="TextWrapping" Value="Wrap"/>
        <Setter Property="Margin" Value="0,2,0,2"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
    </Style>

    <!-- Page HyperlinkButton Style -->
    <Style x:Key="PageHyperlinkButtonStyle" TargetType="HyperlinkButton">
        <Setter Property="TargetName" Value="_new"/>
        <Setter Property="FontSize" Value="12"/>
        <Setter Property="VerticalAlignment" Value="Center"/>
    </Style>

    <!--SiteMap link-->

    <Style x:Key="SiteMapLink" TargetType="HyperlinkButton">
        <Setter Property="FontSize" Value="12"></Setter>
        <Setter Property="Foreground" Value="Black"/>

    </Style>
    <Style x:Key="SiteMapLable" TargetType="TextBlock">
        <Setter Property="FontSize" Value="12"></Setter>

    </Style>


    <!--Heading-->
    <Style x:Key="headings" TargetType="TextBlock">
        <Setter Property="Foreground" Value="#9C00FF"/>
        <Setter Property="FontSize" Value="19"/>
        <Setter Property="FontWeight" Value="Bold"></Setter>
    </Style>

    <!--Hyperlink buttons for Add New-->
    <Style x:Key="Hyperlink" TargetType="HyperlinkButton">
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="FontSize" Value="12"/>
    </Style>


    <!--TextBlock-->
    <Style x:Key="Textblock" TargetType="TextBlock">
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="TextAlignment" Value="Right"></Setter>
        <Setter Property="FontWeight" Value="Bold"></Setter>

    </Style>

    <!-- Hyperlink Button In DataGrid-->
    <Style x:Key="HyperlinkInDataGrid" TargetType="HyperlinkButton">
        <Setter Property="Foreground" Value="Aqua"/>
        <Setter Property="FontWeight" Value="Bold"></Setter>
        <Setter Property="HorizontalAlignment" Value="Center"></Setter>
    </Style>

    <!--TextBox-->
    <Style x:Key="Textboxstyle" TargetType="water:WatermarkedTextBox">
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="Height" Value="25"></Setter>
        <Setter Property="Margin" Value="20,0"></Setter>
        <Setter Property="HorizontalAlignment" Value="Center"></Setter>
    </Style>

    <!--buttons styles-->
    <Style x:Key="Buttonstyle" TargetType="Button">
        <Setter Property="Foreground" Value="#FDD11B"/>
        <Setter Property="Width" Value="100"></Setter>
        <Setter Property="Height" Value="26"></Setter>
        <Setter Property="Background" Value="Black"></Setter>
        <Setter Property="BorderBrush" Value="Black"></Setter>
        <Setter Property="BorderThickness" Value="13"></Setter>
        <Setter Property="FontSize" Value="12"></Setter>
    </Style>

    <Style x:Key="ComboStyle" TargetType="ComboBox">
        <Setter Property="Width" Value="250"></Setter>
        <Setter Property="Margin" Value="20,0"/>
    </Style>


</ResourceDictionary>