public void AddExecute()
 {
     try
     {
         MaintenanceAddFormView form = new MaintenanceAddFormView();
         form.ShowDialog();
         MaintenanceList = maintenances.ViewAllMaintenances();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.ToString());
     }
 }
 public MaintenanceAddFormViewModel(MaintenanceAddFormView maintenanceView)
 {
     this.maintenanceView = maintenanceView;
     ClinicMaintenance    = new vwClinicMaintenance();
     GenderList           = genders.GetGenders();
 }