/// <summary> /// Enumerates the names of all the non-empty cells in the spreadsheet. /// </summary> public IEnumerable<String> GetNamesOfAllNonemptyCells() { Array<string> arr = new Array<string>(); foreach (KeyValuePair<string, cell> c in DG) { if (c.Value.values != null) { arr.add(c.Key); } } return arr; }