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Deletes all conditional formats associated with the represented range.
Use this method to remove every conditional formatting rule from the range's IFormatConditions collection.
void Delete()
Sub Delete()
IRange range = worksheet.Range["A1:A5"];
range.Value = new object[,] {{1}, {3}, {5}, {7}, {9}};
IFormatCondition condition = (IFormatCondition)range.FormatConditions.Add(FormatConditionType.CellValue, FormatConditionOperator.Between, 1, 5);
condition.Interior.Color = Color.Yellow;
range.FormatConditions.Delete();