Class ConditionalFormattingCollection

public class ConditionalFormattingCollection : CollectionBase<formatconditioncollection>, IList<formatconditioncollection>, ICollection<formatconditioncollection>, IEnumerable<formatconditioncollection>, ICollection, IEnumerable

//Instanciando um objeto Workbook
Workbook workbook = new Workbook();
Worksheet sheet = workbook.Worksheets[0];

//Obtendo a Formatação Condicional
ConditionalFormattingCollection cformattings = sheet.ConditionalFormattings;
//Adiciona uma formatação condicional vazia
int index = cformattings.Add();
//Obtém a formatação condicional recém-adicionada
FormatConditionCollection fcs = cformattings[index];

//Define o intervalo de formato condicional.
CellArea ca = new CellArea();
ca.StartRow = 0;
ca.EndRow = 0;
ca.StartColumn = 0;
ca.EndColumn = 0;
fcs.AddArea(ca);
ca = new CellArea();
ca.StartRow = 1;
ca.EndRow = 1;
ca.StartColumn = 1;
ca.EndColumn = 1;
fcs.AddArea(ca);

//Adiciona condição.
int conditionIndex = fcs.AddCondition(FormatConditionType.CellValue, OperatorType.Between, "=A2", "100");
//Adiciona condição.
int conditionIndex2 = fcs.AddCondition(FormatConditionType.CellValue, OperatorType.Between, "50", "100");
//Define a cor de fundo.
FormatCondition fc = fcs[conditionIndex];
fc.Style.BackgroundColor = Color.Red;
//Salvando o arquivo Excel
workbook.Save("output.xls");

'Instanciando um objeto Workbook
DDim workbook As Workbook = New Workbook()
Dim sheet As Worksheet = workbook.Worksheets(0)
'Obtendo a Formatação Condicional
Dim cformattings As ConditionalFormattingCollection = sheet.ConditionalFormattings

'Adiciona uma formatação condicional vazia
Dim index As Integer = cformattings.Add()
'Obtém a formatação condicional recém-adicionada
Dim fcs As FormatConditionCollection = cformattings(index)
'Define o intervalo de formato condicional.
Dim ca As New CellArea()
ca.StartRow = 0
ca.EndRow = 0
ca.StartColumn = 0
ca.EndColumn = 0
fcs.AddArea(ca)
ca = New CellArea()
ca.StartRow = 1
ca.EndRow = 1
ca.StartColumn = 1
ca.EndColumn = 1
fcs.AddArea(ca)

'Adiciona condição.
Dim conditionIndex As Integer = fcs.AddCondition(FormatConditionType.CellValue, OperatorType.Between, "=A2", "100")
'Adiciona condição.
Dim conditionIndex2 As Integer = fcs.AddCondition(FormatConditionType.CellValue, OperatorType.Between, "50", "100")
'Define a cor de fundo.
Dim fc As FormatCondition = fcs(conditionIndex)
fc.Style.BackgroundColor = Color.Red
'Saving the Excel file
workbook.Save("output.xls")

public FormatConditionCollection this[int index] { get; }

public int Add()

public void Copy(ConditionalFormattingCollection cfs)

public void RemoveArea(int startRow, int startColumn, int totalRows, int totalColumns)