从C#使用重载的VB.NET Not运算符 [英] Using overloaded VB.NET Not operator from C#

问题描述

我有一个VB类，它重载了Not运算符；在C#应用程序中似乎无法使用.

I have a VB class which overloads the Not operator; this doesn't seem to be usable from C# applications.

Public Shared Operator Not(item As MyClass) As Boolean
    Return False
End Operator

我可以在VB.NET中使用它:

I can use this in VB.NET:

If Not MyClassInstance Then
    ' Do something
End If

我正在C#应用程序中尝试使用它，但它无法构建.

I am trying to us this in a C# application but it won't build.

if (!MyClassInstance) 
{ 
     // do something
}

我得到了错误

操作员'！'不能应用于类型为'MyClass'的操作数

Operator '!' cannot be applied to operand of type 'MyClass'

谁能告诉我我想念的东西吗?

Can anyone tell me what I am missing?

推荐答案

VB.NET中的Not运算符是 bitwise 运算符，它产生其操作数的补码.它不具有C#的!运算符(逻辑运算符)的等效项.您必须在C#中使用等效的按位运算符才能使用VB.NET运算符重载:

The Not operator in VB.NET is a bitwise operator, it produces the one's complement of its operand. It doesn't have the equivalent of C#'s ! operator, a logical operator. You must use the equivalent bitwise operator in C# to use your VB.NET operator overload:

if(~MyClassInstance) 
{ 
     // do something
}

您可以在VB.NET中编写一个函数，该函数将映射到C#逻辑运算符.看起来应该像这样:

You can write a function in VB.NET that will map to the C# logical operator. That needs to look like this:

<System.Runtime.CompilerServices.SpecialName> _
Public Shared Function op_LogicalNot(item As MyClass) As Boolean
    Return False
End Function

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