public ObservableCollection <SupplierViewModel> GetAll() { var listModels = _Service.GetAll(i => i.ShipOwners); var listVM = VMBaseSolutions.VMEntities.VMEntityListConvertor <SupplierViewModel, Supplier> .ConvertToViewModel(listModels).OrderBy(_OrderByDefaultExpression.Compile()); return(new ObservableCollection <SupplierViewModel>(listVM)); }