The number of standard deviations to include above or below the average in the conditional formatting rule. This attribute is ignored if type is not equal to aboveAverage. If a value is present for stdDev and the rule type = aboveAverage, then this rule is automatically an "above or below N standard deviations" rule.

'Declaration
 
Public Property StdDev As Nullable(Of Integer)

'Usage
 
Dim instance As ExcelGeneralRule
Dim value As Nullable(Of Integer)
 
instance.StdDev = value
 
value = instance.StdDev

public Nullable<int> StdDev {get; set;}