Expression.Lambda Method (Expression, ParameterExpression[])

Creates a LambdaExpression by first constructing a delegate type.

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

public static LambdaExpression Lambda(
	Expression body,
	params ParameterExpression[] parameters
)

Parameters

body
Type: System.Linq.Expressions.Expression

An Expression to set the Body property equal to.

parameters
Type: System.Linq.Expressions.ParameterExpression[]

An array of ParameterExpression objects to use to populate the Parameters collection.

Return Value

Type: System.Linq.Expressions.LambdaExpression
A LambdaExpression that has the NodeType property equal to Lambda and the Body and Parameters properties set to the specified values.

ExceptionCondition
ArgumentNullException

body is null.

-or-

One or more elements of parameters are null.

ArgumentException

parameters contains more than sixteen elements.

The parameters parameter must not have more than sixteen elements.

The elements of parameters must be reference equal to the parameter expressions in body.

This method constructs an appropriate delegate type from one of the System.Func generic delegates. It then passes the delegate type to one of the Lambda factory methods to create a LambdaExpression.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, 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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