C＃警告：已分配变量但从未使用过

Question

I see this warning in a lot of places in my code because of a specific paradigm I keep using throughout. Within objectA, I create objectB and objectB does a lot of it's own work that is necessary, but not referenced anywhere else.

The only answers to this question I see are:

• Suppress the warning
• You are doing something wrong.

Example of what I'm doing in lots of places.

class A {
    B b;
    public A() { 
        b = new B(); 
    }
}

class B {
    public B() {
        Updater.RegisterForSuperImportantUpdates(this);
    }

    public void Update() { 
        // super important stuff happening here 
        ....
    }
}

Does this seem like a valid design or is there an off putting odor here. Suppressing the warning is going to be annoying because this pattern is going to be used frequently.

Answer 1

Why do you want to keep a reference to b(B) if you are not using it after? Can't you just new it without keeping it referenced?

As it seems to be referenced by a third class not mentioned here ( Updater ), it should not be GCeed.

Answer 2

根据干净代码的原则，这是一个有效的警告，您应将代码保持整洁，以使将要修复代码的第二个人不要与代码中使用的未使用变量混淆。