Question

How do I perform the inverse of the bitwise OR ( |= ) operator in C#? Is there a NOR bitwise operator in C# that I can use?

Scenario:

I am inheriting a base class from the .NET framework. This class has an operation which is setting a flag.

Example: flags |= 0x200;

In my derived class, I want to omit this flag setting, as if the operation flags |= 0x200; had never happened.

Is there a way to achieve this?

Answer 1

You can AND (&) with the inverse (~) of the value you want to remove:

flags &= ~0x200;

If you intention is to ensure that this flag is not set. If you want to undo a previous change to this flag, then as @Russell says, XOR may be what you’re after.