Build Your First Windows Phone 7 Silverlight Application

<phoneNavigation:PhoneApplicationPage 
    x:Class="DemoHelloWorldApplication.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phoneNavigation="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Navigation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="800"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"       
    >

    <Grid x:Name="LayoutRoot" Background="{StaticResource PhoneBackgroundBrush}">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

<Grid.Resources>
    <DataTemplate x:Key="ColorItemTemplate">
        <StackPanel Orientation="Vertical">
            <TextBlock Text="{Binding Path=Key}" Foreground="{Binding Path=Key}" />
        </StackPanel>
    </DataTemplate>
</Grid.Resources>
        
        <!--TitleGrid is the name of the application and page title-->
        <Grid x:Name="TitleGrid" Grid.Row="0">
            <TextBlock Text="Hello World Application - Shai Raiten" x:Name="textBlockPageTitle" Style="{StaticResource PhoneTextPageTitle1Style}"/>
            <TextBlock Text="Colors..." x:Name="textBlockListTitle" Style="{StaticResource PhoneTextPageTitle2Style}"/>
        </Grid>

        <!--ContentGrid is empty. Place new content here-->
        <Grid x:Name="ContentGrid" Grid.Row="1" Loaded="ContentGrid_Loaded">
            <Button Content="Change" Height="70" HorizontalAlignment="Left" Margin="306,19,0,0" Name="btn_start" VerticalAlignment="Top" Width="160" Click="button1_Click" />
            <ListBox Height="477"  ItemTemplate="{StaticResource ColorItemTemplate}"  HorizontalAlignment="Left" Margin="20,149,0,0" Name="list_colors" VerticalAlignment="Top" Width="446" BorderBrush="#FFEB1212" BorderThickness="1" SelectionMode="Single" />
            <TextBlock Height="39" HorizontalAlignment="Left" Margin="20,42,0,0" Name="textBlock1" Text="Pick Color" VerticalAlignment="Top" Width="123" />
            <RadioButton Content="Layout" Height="40" HorizontalAlignment="Left" Margin="20,87,0,0" Name="rad_layout" VerticalAlignment="Top" IsChecked="True" />
            <RadioButton Content="Content" Height="40" HorizontalAlignment="Left" Margin="160,87,0,0" Name="rad_ContentGrid" VerticalAlignment="Top" />
            <RadioButton Content="All" Height="40" HorizontalAlignment="Left" Margin="320,87,0,0" Name="rad_all" VerticalAlignment="Top" Width="160" />
        </Grid>
    </Grid>
    
</phoneNavigation:PhoneApplicationPage>