Export (0) Print
Expand All

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
Assembly:  System.Core (in System.Core.dll)

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


Type: System.Linq.Expressions::ExpressionType

The ExpressionType that specifies the type of unary operation.

Type: System.Linq.Expressions::Expression

An Expression that represents the operand.

Type: System::Type

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

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.


operand is nullptr.


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: 4.5, 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

.NET for Windows Phone apps

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

© 2014 Microsoft