Simple Slider

slider.xaml

<phone:PhoneApplicationPage 
    x:Class="WindowsPhoneApplication1.MainPage"
    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"
    >
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Slider 
            Minimum="0"
            Maximum="100"
            Value="50"
            Width="400"
            />
    </Grid>
</phone:PhoneApplicationPage>