net.cs

class Program
{
    static void Main(string[] args)
    {
        TT.Win.SDK.Global.Init("[API Key]", "[API Secret]"]);
        TT.Win.SDK.Api.Events.MessageReceivedEvent += Events_MessageReceivedEvent;
        TT.Win.SDK.Api.Events.StartListening();
        Console.WriteLine("You can post message anytime by entering recipient, message and press <ENTER> (Format: recipientId;message)");
        StartSendMessenger();
    }

    private static void StartSendMessenger()
    {
        while (true) //Keep running the program until user presses ENTER or an invalid input
        {
            var input = Console.ReadLine();
            var arrInput = input.Split(';');
            if (arrInput.Length < 2) //Exit the program if input format is incorrect
                return;

            var messageSent = TT.Win.SDK.Api.Message.SendMessage(arrInput[1], arrInput[0]); //Post message
            if (messageSent.message_id != null)
                Console.WriteLine("Message sent successfully - " + messageSent.message_id);
        } //while loop
    }

    private async static void Events_MessageReceivedEvent(object sender, TT.Win.SDK.Events.MessageEventArgs e)
    {
        if (e.MessageData.sender_user == null)
            e.MessageData.sender_user = await TT.Win.SDK.Api.User.GetCachedUserAsync(e.MessageData.sender);

        Console.WriteLine(string.Format("Message received from {0} : {1}", e.MessageData.sender_user.display_name, e.MessageData.body));

        if (e.MessageData.AttachmentsToDownload != null)
            DownloadFile(e.MessageData);
    }

    private static async void DownloadFile(TT.Win.SDK.Model.MessageEventData message)
    {
        foreach (var attachment in message.AttachmentsToDownload)
        {
            var fileName = string.Format("{0}_{1}{2}", message.message_id, attachment.AttachmentSequence, attachment.FileExtension);
            Console.WriteLine("Downlading attached file " + fileName + " ...");
            var fileContents = await attachment.GetFileContents();
            var filePath = Path.Combine(@"C:\TTAttachments", fileName);
            System.IO.File.WriteAllBytes(filePath, fileContents);
            Console.WriteLine("Downloaded the file at " + folderPath);
        }
    }
}