List<T>.IList.IsReadOnly 属性

定义

获取一个值,该值指示 IList 是否为只读。Gets a value indicating whether the IList is read-only.

property bool System::Collections::IList::IsReadOnly { bool get(); };
bool System.Collections.IList.IsReadOnly { get; }
System.Collections.IList.IsReadOnly
 ReadOnly Property IsReadOnly As Boolean Implements IList.IsReadOnly

属性值

如果 true 是只读的,则为 IList;否则为 falsetrue if the IList is read-only; otherwise, false. List<T> 的默认实现中,此属性始终返回 falseIn the default implementation of List<T>, this property always returns false.

实现

注解

在创建只读集合后,该集合不允许添加、移除或修改元素。A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created.

只读集合就是一个集合,其中包含阻止修改集合的包装器;因此,如果对基础集合进行了更改,只读集合将反映这些更改。A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes.

检索此属性的值的运算复杂度为 O(1)。Retrieving the value of this property is an O(1) operation.

适用于