用户模式构造-易变构造

    /// <summary>
    /// 调用Volatile.Write来写入最后一个值
    /// 调用Volatile.Read来读取第一个值
    /// </summary>
    internal sealed class ThreadsSharingData
    {
        private int m_flag = 0;

        private int m_value = 0;

        //线程1
        public void Thread1()
        {
            m_value = 5;

            //在将1写入m_flag之前，必须先将5写入m_value
            Volatile.Write(ref m_flag, 1);
        }

        //线程2
        public void Thread2()
        {
            //m_value必然在读取了m_flag之后读取
            if (Volatile.Read(ref m_flag) == 1)
            {
                Console.WriteLine(m_value);
            }
        }
    }