albatross. 1  A metaphor for a dead weight or burden that one must carry, especially when the burden is not a literal one but a stigma of some kind that one cannot easily discard or throw off. The name comes from a story about a sailor who killed an albatross that was following his ship, an act thought to bring bad luck upon the ship.
Run the Remove Characters tool by clicking on its icon under the Ablebits Data tab in Excel. To remove characters select the range with the cells that contain values you want to delete. Expand the group Remove characters or substrings. You can select one of three radio buttons according to your task.
And here is another way: I would suggest you to create a new List<T> where T will be DatColumn. Then loop through the columns of DataTable, and add the columns you want to remove into the generic list. Do not delete then directly, because it may come to column (same error as you received) indexing error (when you delete a column, all other indexes bellow this column changes). When you will finish adding columns to delete into a list, do another loop through this list, and delete the columns from there.