public bool CheckPhoneFormat(string phone = null) { if (AssignFieldOnCheck && phone != null) { Phone = phone; } else { phone = Phone; } var result = _authProvider.CheckPhoneFormat(phone); // _phoneFormatMessage = Array.Find<string>(FormatMessages, p => true); _phoneFormatMessage = FormatMessages.FirstOrDefault(); if (IsChatty) { RaisePropertyChanged(nameof(IsPhoneFormatOk)); } return(result); }