LinkedList<T>.First 属性
定义
获取 LinkedList<T> 的第一个节点。Gets the first node of the LinkedList<T>.
public:
property System::Collections::Generic::LinkedListNode<T> ^ First { System::Collections::Generic::LinkedListNode<T> ^ get(); };
public System.Collections.Generic.LinkedListNode<T> First { get; }
public System.Collections.Generic.LinkedListNode<T>? First { get; }
member this.First : System.Collections.Generic.LinkedListNode<'T>
Public ReadOnly Property First As LinkedListNode(Of T)
属性值
LinkedListNode<T> 的第一个 LinkedList<T>。The first LinkedListNode<T> of the LinkedList<T>.
示例
有关包括此属性的示例,请参阅 LinkedList<T> 类。For an example that includes this property, see the LinkedList<T> class.
注解
LinkedList<T> 接受 null 作为 Value 引用类型的有效,并允许重复值。LinkedList<T> accepts null as a valid Value for reference types and allows duplicate values.
如果 LinkedList<T> 为空,则 First 和属性将 Last 包含 null 。If the LinkedList<T> is empty, the First and Last properties contain null.
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.