Expression.MakeUnary Method (ExpressionType, Expression, Type)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Creates a UnaryExpression, given an operand, by calling the appropriate factory method.
Assembly: System.Core (in System.Core.dll)
'Declaration Public Shared Function MakeUnary ( _ unaryType As ExpressionType, _ operand As Expression, _ type As Type _ ) As UnaryExpression
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 Nothing if not applicable).
Return Value
Type: System.Linq.Expressions.UnaryExpressionThe UnaryExpression that results from calling the appropriate factory method.
| Exception | Condition |
|---|---|
| ArgumentNullException | operand is Nothing. |
| 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 parameter is ignored if it does not apply to the factory method that is called.