C# 同步锁 lock Monitor

       private static object obj = new object();
        public static void SomeMethod()
        {
            bool lockTaken=false; //假定没有获取锁
            try
            {
                //无论是否抛出异常下面代码都正常运行
                Monitor.Enter(obj, ref lockTaken);

                //执行线程安全的操作...
            }
            catch (Exception ex)
            {
                //异常捕获
            }
            finally
            {
                //如果已获锁就释放
                if (lockTaken)
                    Monitor.Wait(obj);
            }
        }