Expression::Not Method (Expression, MethodInfo)
Creates a UnaryExpression that represents a bitwise complement operation. The implementing method can be specified.
Assemblies: System.Core (in System.Core.dll)
System.Linq.Expressions (in System.Linq.Expressions.dll)
- Type: System.Linq.Expressions::Expression
expression is nullptr.
method is not nullptr and the method it represents returns void, is not static (Shared in Visual Basic), or does not take exactly one argument.
method is nullptr and the unary not operator is not defined for expression.Type.
expression.Type (or its corresponding non-nullable type if it is a nullable value type) is not assignable to the argument type of the method represented by method.
The Method property of the resulting UnaryExpression is set to the implementing method. The Type property is set to the type of the node. If the node is lifted, the IsLifted and IsLiftedToNull properties are both true. Otherwise, they are false.
The following rules determine the implementing method for the operation:
If method is not nullptr and it represents a non-void, static (Shared in Visual Basic) method that takes one argument, it is the implementing method for the node.
If expression.Type is a user-defined type that defines the unary not operator, the MethodInfo that represents that operator is the implementing method.
Otherwise, if expression.Type is a numeric type, the implementing method is nullptr.
If the implementing method is not nullptr:
If expression.Type is assignable to the argument type of the implementing method, the node is not lifted. The type of the node is the return type of the implementing method.
If the following two conditions are satisfied, the node is lifted and the type of the node is the nullable type that corresponds to the return type of the implementing method:
expression.Type is a nullable value type and the corresponding non-nullable value type is equal to the argument type of the implementing method.
The return type of the implementing method is a non-nullable value type.
If the implementing method is nullptr, the type of the node is expression.Type. If expression.Type is non-nullable, the node is not lifted. Otherwise, the node is lifted.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)