Hello, i also have the same problem - i try to copy validations for several columns to several rows.
Currentrly i am using following code:
ExcelRangeBase destRange = ws.Cells[3, 1, table.Rows.Count, 81];
ws.Cells[2, 1, 2, 81].Copy(destRange);
But the validation is not copied!
Maybe there is a function like "copy" -> "paste formulas only" like it is available in Excel2007.