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Gets or sets the number of days in each generated group when GroupBy includes Days.
This value is used when GroupBy includes Days.
When grouping is applied, it must be a finite whole number greater than 0.
The effective start date must also be earlier than the effective end date.
The default value is 1.
public double Days { get; set; }
Public Property Days As Double
PivotFieldDateGroupOptions options = new PivotFieldDateGroupOptions();
options.GroupBy = PivotFieldDateGroupBy.Days;
options.Days = 7;
double days = options.Days;