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Expression.Lambda Method (Expression, ParameterExpression[])

Creates a LambdaExpression by first constructing a delegate type.

Namespace:  System.Linq.Expressions
Assembly:  System.Core (in System.Core.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 four elements.

The parameters parameter must not have more than four 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.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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
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