private async void Converter(object sender, RoutedEventArgs e) { if (TextCounttoken.Text == "0.00" || TextCounttoken.Text == "" || TextCounttoken.Text.Contains("-") || TextCounttoken.Text.Contains("!")) { MessageBox.Show("Error!"); return; } string result = TextCounttoken.Text.ToString().Replace('.', ','); TextCounttoken1.Text = await UserCreator.ConverterResult("kil", CryptoText.Text, CryptoText2.Text, float.Parse(result)); USDTFirst.Text = await UserCreator.USDAsyncPrice(CryptoText.Text, float.Parse(result)); }