'Declaration Public ReadOnly Property Columns As WorksheetColumnCollection
public WorksheetColumnCollection Columns {get;}
The collection of columns is a fixed length collection, with the maximum number of columns in the collection being Workbook.MaxExcelColumnCount or Workbook.MaxExcel2007ColumnCount, depending on the Workbook.CurrentFormat. Internally, the columns are only created and added to the collection when they are requested.
Note: Iterating the collection will not create all columns. It will only iterate the columns which have already been used. To create and iterate all columns in the worksheet use a For loop, iterating from 0 to one less than the maximum column count, and pass in each index to the collection's indexer.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2