在委托中使用'base'关键字会导致System.BadImageFormatException [英] Using 'base' keyword in delegate causes System.BadImageFormatException

问题描述

我有一个奇怪的问题，我想如果有人可以启发我为什么这是发生。我在基本抽象类中有一个受保护的方法如下：

I have a weird problem and I would like if someone can enlighten me on why is this happening. I have a protected method in a base abstract class as following:

protected T ForExistingEntity<T>(TEntity entity, object key, Func<Entity, T> action) {
    entity = GetByKey(key);
    if (entity != null)
        return action(entity);

    return default(T); 
}

我继承的类的原始调用如下：

My original call from an inherited class was as follows:

return base.ForExistingEntity(
    new MyEntity(), key, e => {
        e.someFiled = 5;
        return base.Update(e);
    }
);

当此代码执行时，会在以下行中引发异常：

When this code executes, an exception get raised at the line that reads:

return action(entity);

。异常为：

System.BadImageFormatException：尝试加载格式不正确的程序。 （来自HRESULT的异常：0x8007000B）

System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

现在，当我按如下方式修改调用时：

Now when I modify my call as following:

return base.ForExistingEntity(
    new MyEntity(), key, e => {
        e.someFiled = 5;
        return Update(e);
    }
);

它没有任何问题正常运行。

it runs normally without any issues.

修改：

Update方法位于基本抽象类中，如下所示：

The Update method is located in the base abstract class and looks like this:

public virtual bool Update(TEntity entity) {
    Condition.Requires(entity, "entity")
        .IsNotNull();

    if (ValidateEntity(entity))
        return Update(entity, true);

    return false;
}

我开始认为这是因为Update是虚拟的调用实际上是源自基类本身？

I am starting to think that this is happening because of Update being virtual and the call actually originates in the base class itself? The exception isn't very helpfull anyway.

推荐答案

这似乎是一个已知的C＃编译器错误涉及从泛型中的匿名方法调用基本虚拟方法类。如果你想解决，不要犹豫，upvote这个bug连接。幸运的是，这里的解决方法很简单。

This seems to be a known C# compiler bug involving calling a base virtual method from an anonymous method within a generic class. Don't hesitate to upvote this bug on connect if you want it solved. Fortunately, the workaround is quite simple here.

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