How to Play .mp3/.Wma Music in a Metro App

Here is how to do it:

1. Open VS 2012 for Windows 8

2. Create a new blank project of type Blank App/C#

3. Paste this code into the <Grid> element in MainPage.xaml

XML

<Grid.ColumnDefinitions>
    <ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
    <RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<MediaElement x:Name="mediaElement" Grid.Column="0" Grid.Row="0" IsMuted="False" Volume="100" AudioCategory="ForegroundOnlyMedia" PosterSource="Assets/Logo.png" RealTimePlayback="False" AutoPlay="True" Height="100" Width="100"></MediaElement>

4. Paste this code into the class MainPage in MainPage.xaml.cs

IRandomAccessStreamWithContentType stream = null;
void OpenSong()
{
    Windows.Storage.KnownFolders.MusicLibrary.GetFileAsync(&quot;_.mp3&quot;).Completed = (async, status) =&gt;
    {
        if (async.Status == AsyncStatus.Completed)
        {
            StorageFile storageFile = async.GetResults();
            storageFile.OpenReadAsync().Completed = (async2, status2) =&gt;
            {
                if (async2.Status == AsyncStatus.Completed)
                {
                    stream = (IRandomAccessStreamWithContentType)async2.GetResults();
                    this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.High, PlaySong).Completed = (async3, status3) =&gt;
                    {
                    };
                }
            };
        }
    };
}
void PlaySong()
{
    //-Setting only the Source property is not enough, it would not play for me that way; it has to be done through the SetSource method
    mediaElement.SetSource(stream, stream.ContentType);
    mediaElement.Play();
}

5. Call the OpenSong() method in the empty OnNavigatedTo() method. If you call it in the constructor, you will not get any error, but the sound simply will not play

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    OpenSong();
}

6. Create a music file _.mp3 in the W8 Music library

7. Enable, in the Package.appxmanifest file, access to the Music library

8. Run the program and test it

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