Enum XlsxRuleKind NamespaceDocToolkit AssemblyDocToolkit.Xlsx.dll Which comparison an XlsxRule makes. public enum XlsxRuleKind Fields Between = 2 The cell's number is between Value and High. Blank = 5 The cell is empty. Contains = 4 The cell contains Text. EqualTo = 3 The cell equals Text. GreaterThan = 0 The cell's number is greater than Value. LessThan = 1 The cell's number is less than Value.