ReadOnlyDictionary<TKey,TValue>.ValueCollection.ICollection<TValue>.Add(TValue) 方法

定义

在所有情况下都会引发 NotSupportedException 异常。Throws a NotSupportedException exception in all cases.

 virtual void System.Collections.Generic.ICollection<TValue>.Add(TValue item) = System::Collections::Generic::ICollection<TValue>::Add;
void ICollection<TValue>.Add (TValue item);
abstract member System.Collections.Generic.ICollection<TValue>.Add : 'Value -> unit
override this.System.Collections.Generic.ICollection<TValue>.Add : 'Value -> unit
Sub Add (item As TValue) Implements ICollection(Of TValue).Add

参数

item
TValue

要添加到集合中的对象。The object to add to the collection.

实现

例外

在所有情况下。In all cases.

注解

此成员是显式接口成员的实现。This member is an explicit interface member implementation. 它只能在 ReadOnlyDictionary<TKey,TValue>.ValueCollection 实例被强制转换为 ICollection<T> 接口时使用。It can be used only when the ReadOnlyDictionary<TKey,TValue>.ValueCollection instance is cast to an ICollection<T> interface. ICollection<T>接口指定在 Add 实现接口的集合为只读时,方法应引发 NotSupportedException 异常。The ICollection<T> interface specifies that the Add method should throw a NotSupportedException exception if the collection that implements the interface is read-only.

适用于