private async void metroButton8_Click(object sender, EventArgs e) { if (String.IsNullOrWhiteSpace(metroTextBox10.Text)) { return; } metroButton8.Enabled = false; metroButton10.Enabled = false; _chatId = 0; label4.Text = null; _chatId = await TelegramApi.GetChatIdViaUsername(metroTextBox10.Text); if (_chatId != 0) { label4.Text = @"Deine Chat Id lautet " + _chatId + @"."; label4.ForeColor = Color.Green; metroButton10.Enabled = true; } else { label4.Text = @"Deine Chat Id konnte nicht gefunden werden. Bitte wiederhole den vorgang oder Kontakte den Entwickler."; label4.ForeColor = Color.Red; } metroButton8.Enabled = true; }