/// <summary> /// Adds a new mobile device to the current account. /// </summary> /// <param name="mobileDevice">A mobile device.</param> internal void AddMobileDevice(MobileDevice mobileDevice) { Throw.IfArgumentNull(mobileDevice, nameof(mobileDevice)); List <MobileDevice> mobileDevices = new List <MobileDevice>(new[] { mobileDevice }); if (this.MobileDevices != null) { mobileDevices.AddRange(this.MobileDevices); } this.MobileDevices = mobileDevices; }