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