MakeUnary Method (ExpressionType, Expression, Type)

Expression.MakeUnary Method (ExpressionType, Expression, Type)


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

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

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


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 null if not applicable).

Return Value

Type: System.Linq.Expressions.UnaryExpression

The UnaryExpression that results from calling the appropriate factory method.

Exception Condition

operand is null.


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.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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