ReadOnlyDictionary<TKey,TValue>.KeyCollection.ICollection<TKey>.Add Method

Definition

Namespace:

System.Collections.ObjectModel

Assembly:

System.Runtime.dll

Source:

ReadOnlyDictionary.cs

Throws a NotSupportedException exception in all cases.

 virtual void System.Collections.Generic.ICollection<TKey>.Add(TKey item) = System::Collections::Generic::ICollection<TKey>::Add;

void ICollection<TKey>.Add (TKey item);

abstract member System.Collections.Generic.ICollection<TKey>.Add : 'Key -> unit
override this.System.Collections.Generic.ICollection<TKey>.Add : 'Key -> unit

Sub Add (item As TKey) Implements ICollection(Of TKey).Add

Parameters

item

TKey

The object to add to the collection.

Implements

Add(T)

Exceptions

NotSupportedException

In all cases.

Remarks

This member is an explicit interface member implementation. It can be used only when the ReadOnlyDictionary<TKey,TValue>.KeyCollection instance is cast to an ICollection<T> interface. The ICollection<T> interface specifies that the Add method should throw a NotSupportedException exception if the collection that implements the interface is read-only.