The collection has methods for counting, enumerating, adding, and removing columns from the collection.
The XLColumn objects do not contain any data. If you remove a column from the collection, the data will be lost. If you later re-insert that same column back into the collection, the column will be blank.
C1XLBook book = new C1XLBook(); XLSheet sheet = book.Sheets[0]; XLCell cell = sheet[3,3]; // creates 4 rows and 4 columns
System.Object
C1.Excel.XLColumnCollection