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Gets or sets a value that represents the first day of the week, the one displayed in the first column of the calendar.
public DayOfWeek FirstDayOfWeek { get; set; }
Public Property FirstDayOfWeek As DayOfWeek
Setting this property to null causes the calendar to use the default for the current culture. In the English culture, the first day of the week is Sunday; in most European cultures, the first day of the week is Monday.