TTableColumnDefinition.HeaderRowCellStyle Property
Style for the header row cell in the column, if it doesn't have a given cell style. This property has more priority than the table header row cell style, but less than the cell style. FlexCel will ignore this value when adding a table and read the style from the cell itself.
Syntax
Namespace: FlexCel.Core
public String HeaderRowCellStyle { get; }