UserControl Class

<phone:PhoneApplicationPage x:Class="UserControlExample.NameReporter"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="800" d:DesignWidth="480">
  <StackPanel HorizontalAlignment="Center">

    <StackPanel.Resources>
      <!--Create a Style for a TextBlock.-->
      <Style TargetType="TextBlock" x:Key="TextBlockStyle">
                <Setter Property="Foreground" Value="{StaticResource PhoneForegroundColor}"/>
        <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeSmall}"/>
        <Setter Property="VerticalAlignment" Value="Center"/>
                <Setter Property="Margin" Value="4"/>
            </Style>

      <!--Create a Style for a TextBlock.-->
      <Style TargetType="TextBox" x:Key="TextBoxStyle">
        <Setter Property="Width" Value="200"/>
                <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeSmall}"/>
                <Setter Property="Background" Value="{StaticResource PhoneForegroundColor}"/>
      </Style>
    </StackPanel.Resources>

        <TextBlock FontSize="{StaticResource PhoneFontSizeSmall}" Text="Enter your name"/>
    <StackPanel Orientation="Horizontal">
           <TextBlock Style="{StaticResource TextBlockStyle}" Text="First Name:" />
           <TextBox Name="firstName" Style="{StaticResource TextBoxStyle}"/>
    </StackPanel>
    <StackPanel Orientation="Horizontal">
            <TextBlock Style="{StaticResource TextBlockStyle}" Text="Last Name:" />

            <TextBox Name="lastName" Style="{StaticResource TextBoxStyle}"   />
    </StackPanel>
    <Button  Content="Submit" Click="Button_Click"/>

  </StackPanel>
</phone:PhoneApplicationPage>

  <Grid xmlns:src="clr-namespace:UserControlExample" 
        Background="Transparent" Margin="0,50,0,0">
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
    <RowDefinition Height="Auto"/>
  </Grid.RowDefinitions>
  <src:NameReporter Grid.Row="0"/>
  <src:NameReporter Grid.Row="1" Margin="0,15,0,0"/>
</Grid>