public async Task StopRoamingFile(IBindableStorageFile file) { using (await f_lock.Acquire()) { if (!LocalFiles.Contains(file)) { //Backing values string oldPath = GetParentFolder(file.BackingFile); string value = await _ivService.GetValue(oldPath, FileLocation.Roamed); await _ivService.Remove(oldPath, FileLocation.Roamed); await file.BackingFile.MoveAsync(_localFolder, file.BackingFile.Name, NameCollisionOption.GenerateUniqueName); await _ivService.Add(GetParentFolder(file.BackingFile), value, FileLocation.Local); RoamedFiles.Remove(file); //UI file.IsRoamed = false; LocalFiles.Add(file); } } }