Можно как-то по другому, а не так как в офф документации ReplyKeyboardMarkup replyKeyboardMarkup = new(new [] { new KeyboardButton[] { "One", "Two" }, new KeyboardButton[] { "Three", "Four" }, }) { ResizeKeyboard = true }; Код ReplyKeyboardMarkup replyKeyboardMarkup = new(new [] { new KeyboardButton[] { "One", "Two" }, new KeyboardButton[] { "Three", "Four" }, }) { ResizeKeyboard = true }; Так как не подходит версия c#