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Expression.MakeUnary Method (ExpressionType, Expression, Type, MethodInfo)

Creates a UnaryExpression, given an operand and implementing method, by calling the appropriate factory method.

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

public static UnaryExpression MakeUnary(
	ExpressionType unaryType,
	Expression operand,
	Type type,
	MethodInfo method
)

Parameters

unaryType
Type: System.Linq.Expressions.ExpressionType

The ExpressionType that specifies the type of unary operation.

operand
Type: System.Linq.Expressions.Expression

An Expression that represents the operand.

type
Type: System.Type

The Type that specifies the type to be converted to (pass null if not applicable).

method
Type: System.Reflection.MethodInfo

The MethodInfo that represents the implementing method.

Return Value

Type: System.Linq.Expressions.UnaryExpression
The UnaryExpression that results from calling the appropriate factory method.

ExceptionCondition
ArgumentNullException

operand is null.

ArgumentException

unaryType does not correspond to a unary expression node.

The unaryType parameter determines which UnaryExpression factory method this method calls. For example, if unaryType is equal to Convert, this method invokes Convert. The type and method parameters are ignored if they do not apply to the factory method that is called.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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