public async Task <IEnumerable <Item> > GetItemsFromFileAsync(bool forceRefresh = false)
 {
     return(await ItemSerialization.ReadAllData(VariablesGlobal.NAME_FILE_DATA));
 }
 private async void PopulateItemsCollectionFromDataFile()
 {
     items = await ItemSerialization.ReadAllData(VariablesGlobal.NAME_FILE_DATA);
 }