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UniqueConstraint Constructor (String, String(), Boolean)

Initializes a new instance of the UniqueConstraint class with the specified name, an array of DataColumn objects to constrain, and a value specifying whether the constraint is a primary key.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

<BrowsableAttribute(False)> _
Public Sub New ( _
	name As String, _
	columnNames As String(), _
	isPrimaryKey As Boolean _


Type: System.String

The name of the constraint.

Type: System.String()

An array of DataColumn objects to constrain.

Type: System.Boolean

true to indicate that the constraint is a primary key; otherwise, false.

This constructor is provided for design time support in the Visual Studio .NET environment. UniqueConstraint objects created by using this constructor must then be added to the collection via AddRange. Columns with the specified names must exist at the time the method is called, or if BeginInit has been called prior to calling this constructor, the columns with the specified names must exist at the time that EndInit is called.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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