TeleBotDotNet is a Telegram Bot API for the .NET Framework. It is written in C# and is fully object-oriented.
To send a message:
var teleBot = new TeleBot("YOUR_API_KEY_HERE", false);
teleBot.SendMessage(new SendMessageRequest
{
ChatId = updateResponse.Message?.UserChat.Id ?? updateResponse.Message.GroupChat.Id,
Text = "This is a test.",
ReplyToMessageId = updateResponse.Message.MessageId
});
For more see Naxiz/TeleBotDotNetExamples.