为什么在BinaryReader上调用Dispose（）会导致编译错误？ [英] Why calling Dispose() on BinaryReader results in compile error?

问题描述

我有以下类在内部使用BinaryReader并实现IDisposable。

I have the following class which uses BinaryReader internally and implements IDisposable.

class DisposableClass : IDisposable
    {
        private BinaryReader reader;
        public DisposableClass(Stream stream)
        {
            reader = new BinaryReader(stream);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (disposing)
            {
                ((IDisposable)reader).Dispose();
//                reader.Dispose();// this won't compile
            }
        }

        public void Dispose()
        {
            this.Dispose(true);
        }
    }

我已经知道需要将BinaryReader强制转换为IDisposable才能调用对其进行处理，但是我不明白为什么不能不转换为IDisposable而直接调用Dispose（）方法吗？

I have already figured out that I need to cast BinaryReader to IDisposable to be able to call Dispose on it, but I don't understand why I can't just call the Dispose() method directly without casting to IDisposable?

推荐答案

该方法不起作用，因为已经明确实现了 BinaryReader 上的 Dispose 方法。

It won't work because the Dispose method on BinaryReader has been explicitly implemented.

不是被隐式实现，例如：

Instead of being implicitly implemented, as in:

public void Dispose()
{
}

...它已明确实现，如： / p>

...it has been explicitly implemented, as in:

void IDisposable.Dispose()
{
}

...这意味着只能通过 IDisposable 界面进行访问。因此，必须首先将实例转换为 IDisposable 。

...which means it can only be accessed via the IDisposable interface. Therefore, you have to cast the instance to IDisposable first.

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