Article
11/18/2011

Expression.New Method (ConstructorInfo, IEnumerable<Expression>)

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Creates a NewExpression that represents calling the specified constructor with the specified arguments.

Namespace: System.Linq.Expressions
Assembly: System.Core (in System.Core.dll)

Syntax

'Declaration
Public Shared Function New ( _
    constructor As ConstructorInfo, _
    arguments As IEnumerable(Of Expression) _
) As NewExpression

public static NewExpression New(
    ConstructorInfo constructor,
    IEnumerable<Expression> arguments
)

Parameters

constructor
Type: System.Reflection.ConstructorInfo
The ConstructorInfo to set the Constructor property equal to.

arguments
Type: System.Collections.Generic.IEnumerable<Expression>
An IEnumerable<T> that contains Expression objects to use to populate the Arguments collection.

Return Value

Type: System.Linq.Expressions.NewExpression
A NewExpression that has the NodeType property equal to New and the Constructor and Arguments properties set to the specified values.

Exceptions

Exception	Condition
ArgumentNullException	constructor is nulla null reference (Nothing in Visual Basic). -or- An element of arguments is nulla null reference (Nothing in Visual Basic).
ArgumentException	The arguments parameter does not contain the same number of elements as the number of parameters for the constructor that constructor represents. -or- The Type property of an element of arguments is not assignable to the type of the corresponding parameter of the constructor that constructor represents.

ArgumentNullException

constructor is nulla null reference (Nothing in Visual Basic).

-or-

An element of arguments is nulla null reference (Nothing in Visual Basic).

ArgumentException

The arguments parameter does not contain the same number of elements as the number of parameters for the constructor that constructor represents.

-or-

The Type property of an element of arguments is not assignable to the type of the corresponding parameter of the constructor that constructor represents.

Remarks

The arguments parameter must contain the same number of elements as the number of parameters for the constructor represented by constructor. If arguments is nulla null reference (Nothing in Visual Basic), it is considered empty, and the Arguments property of the resulting NewExpression is an empty collection.

The Type property of the resulting NewExpression represents the declaring type of the constructor represented by constructor. The Members property is an empty collection.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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