public ContractorViewModel()
 {
     this.contractorDataService = new ContractorDataService();
     progressService            = DependencyService.Get <IProgressService> ();
     db             = new ContractorDatabase();
     contractorList = new ObservableCollection <Contractor>();
 }
 public ContractorViewModel()
 {
     // this.navigation = navigation;
     this.contractorDataService = new ContractorDataService();
     db             = new ContractorDatabase();
     contractorList = new ObservableCollection <Contractor>();
     // BindContractor();
 }