THeaderAndFooter.EvenHeader Property
Header for even pages. Note that this value is valid if and only if DiffEvenPages is true. For a description of the possible values of this string, see ExcelFile.PageHeader If you don't want a different header for even pages, set DiffEvenPages to false or call SetAllHeaders.
Syntax
Namespace: FlexCel.Core
public String EvenHeader { get; set; }