static async void testApiAsync()
{
    var Bot = new Telegram.Bot.Api("your API access Token");
    var me = await Bot.GetMeAsync();
    System.Console.WriteLine("Hello my name is " + me.FirstName);
}

static void testApi()
{
    var Bot = new Telegram.Bot.Api("your API access Token");
    var me = Bot.GetMeAsync().Result;
    System.Console.WriteLine("Hello my name is " + me.FirstName);
}