gistfile1.cs

foreach (var csvline in csv)
{
          var csvlineParsed = csvline.Split(';');
          for (uint index = 0; index < csvlineParsed.Length; index++)
          {
              var cell = new CellEntry(i, index + 1);
              cell.Id = new AtomId(string.Format("{0}/{1}", cellFeed.Self, "R" + i + "C" + index + 1));
              cell.InputValue = csvlineParsed[index];
              cell.BatchData = new GDataBatchEntryData("R" + cell.Row + "C" + cell.Column, GDataBatchOperationType.update);
              batchRequest.Entries.Add(cell);

          }
      i++;
}

var batchResponse = (CellFeed) _service.Batch(batchRequest, new Uri(cellFeed.Batch));