小编Ill*_*ion的帖子

我在FCL代码中发现了一个不寻常的样本.

这是System.IO.BinaryReader中的方法:

    protected virtual void Dispose(bool disposing) { 
        if (disposing) { 
            Stream copyOfStream = m_stream;
            m_stream = null; 
            if (copyOfStream != null && !m_leaveOpen)
                copyOfStream.Close();
        }
        m_stream = null; 
        m_buffer = null;
        m_decoder = null; 
        m_charBytes = null; 
        m_singleChar = null;
        m_charBuffer = null; 
    }

"copyOfStream"对执行逻辑有什么影响？