private void send_Click_1(object sender, EventArgs e) { if (address_textBox.Text == "" && amount_numericUpDown.Value == 0) { error_label.Text = "Please enter the fields!"; } else { IBitcoinService bitcoinService = new BitcoinService(); var a = bitcoinService.ValidateAddress(address_textBox.Text); Console.WriteLine(a); if (a.IsValid == true) { if (amount_numericUpDown.Value <= bitcoinService.GetBalance()) { var b = Convert.ToDecimal(amount_numericUpDown.Value); bitcoinService.SendToAddress(address_textBox.Text, b, null, null); error_label.Text = "Send Successfully!"; } else { error_label.Text = "Please enter valid amount !"; } } else { error_label.Text = "Please enter a valid address!"; } } }