Expression.MakeUnary Method (ExpressionType, Expression, Type, MethodInfo)
[ 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 and implementing method, by calling the appropriate factory method.
Assembly: System.Core (in System.Core.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.UnaryExpressionThe UnaryExpression that results from calling the appropriate factory method.
| 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 type and method parameters are ignored if they do not apply to the factory method that is called.