Expression::MakeUnary Method (ExpressionType, Expression^, Type^)

.NET Framework (current version)

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

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

Syntax

public:
static UnaryExpression^ MakeUnary(
	ExpressionType unaryType,
	Expression^ operand,
	Type^ type
)

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).

Return Value

Type: System.Linq.Expressions::UnaryExpression^

The UnaryExpression that results from calling the appropriate factory method.

Exceptions

Exception	Condition
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 typeparameter is ignored if it does not apply to the factory method that is called.

Version Information

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1