// Use the DeviceLocator to find a Chromecast
var receiver = (await new DeviceLocator().FindReceiversAsync()).First();

var sender = new Sender();
// Connect to the Chromecast
await sender.ConnectAsync(receiver);
// Launch the default media receiver application
var mediaChannel = sender.GetChannel<IMediaChannel>();
await sender.LaunchAsync(mediaChannel);
// Load and play Big Buck Bunny video
var mediaStatus = await mediaChannel.LoadAsync(
    new MediaInformation() { ContentId = "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" });