public void ActivateCallerID() { // Activate the callerID by the verification code. try { var voximplant = new VoximplantAPI(); var result = voximplant.ActivateCallerID( "12345", calleridId: 1L ).Result; Console.WriteLine($"Response: {result.ToString()}"); } catch (Exception e) { Console.WriteLine($"Error: {e.Message}"); } }