简单的属性是否需要同步？

Question

我有一个简单的属性：

Private _t As DateTime = DateTime.Now
    Public Property Test As DateTime
        Get
            Return _t
        End Get
        Set(value As DateTime)
            _t = value
        End Set
    End Property

现在我有两个独立的线程：线程1永久调用getter，线程2永久调用setter with datetime.now

我是否需要同步该属性？ 该属性是处于未定义状态还是空/无状态还是会一直返回日期？