Nullable Enumeration

Used to specify the way null values are stored.
Public Enum Nullable 
   Inherits System.Enum
public enum Nullable : System.Enum 
AutomaticAutomatic. Data stored as null if allowed, otherwise as empty string.
DisallowColumn doesn't allow empty values.
EmptyStringEmpty String. Data stored as a zero-length string.
NothingNothing. Data stored as Nothing (C# null).
NullDBNull. Data stored as DBNull value.

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also