Sets or returns whether the worksheet will allow users to delete columns when the worksheet is protected.

 public boolean AllowDeleteColumns{ get; set; }
Public Property AllowDeleteColumns() As Boolean

          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Open(@"C:\MySpreadsheet.xlsx");
          Worksheet ws = wb.Worksheets[0];
          ws.SheetProtection.AllowDeleteColumns = true;
          ws.Protect("password");
        

          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Open("C:\MySpreadsheet.xlsx")
          Dim ws As Worksheet = wb.Worksheets(0)
          ws.SheetProtection.AllowDeleteColumns = true
          ws.Protect("password");