say.cs

using GoogleCast;
using GoogleCast.Channels;
using GoogleCast.Models.Media;
using System.Linq;
using System.Threading.Tasks;

namespace SayGoogleHome
{
    class Program
    {
        static void Main(string[] args)
        {
            Say().GetAwaiter().GetResult();
        }

        static async Task Say()
        {
            var receiver = (await new DeviceLocator().FindReceiversAsync()).First();

            var sender = new Sender();
            await sender.ConnectAsync(receiver);
            var mediaChannel = sender.GetChannel<IMediaChannel>();
            await sender.LaunchAsync(mediaChannel);

            var url = "https://www.dropbox.com/s/zc3mzkh4b6l6nub/say.wav?dl=0&raw=1"; // 任意の音声ファイル
            var mediaStatus = await mediaChannel.LoadAsync(new Media()
            {
                //ContentType = "audio/mp3",
                ContentId = url
            });

            await sender.DisconnectAsync();
        }
    }
}