CollectionBase.IList.IsReadOnly 属性

定义

命名空间:
System.Collections
程序集:
mscorlib.dll, System.Collections.NonGeneric.dll
程序集:
System.Collections.NonGeneric.dll
程序集:
mscorlib.dll
程序集:
netstandard.dll

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

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

属性值

Boolean

如果 true 是只读的，则为 CollectionBase；否则为 false。true if the CollectionBase is read-only; otherwise, false. 默认值为 false。The default is false.

实现

IsReadOnly

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.

检索此属性的值是一个 O(1) 运算。Retrieving the value of this property is an O(1) operation.

适用于