Expression::MakeUnary Method (ExpressionType, Expression^, Type^, MethodInfo^)
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::UnaryExpression^The 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.
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