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DateTimeFormatInfo.FirstDayOfWeek Property

Gets or sets the first day of the week.

Namespace:  System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

public DayOfWeek FirstDayOfWeek { get; set; }

Property Value

Type: System.DayOfWeek
A System.DayOfWeek value representing the first day of the week. The default for InvariantInfo is Sunday.


The property is being set to a value that is not a valid System.DayOfWeek value.


The property is being set and the DateTimeFormatInfo is read-only.

This property is affected if the value of the Calendar property changes.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0