Dictionary<TKey,TValue>.KeyCollection Constructor
Definition
Important
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Initializes a new instance of the Dictionary<TKey,TValue>.KeyCollection class that reflects the keys in the specified Dictionary<TKey,TValue>.
public:
KeyCollection(System::Collections::Generic::Dictionary<TKey, TValue> ^ dictionary);public KeyCollection (System.Collections.Generic.Dictionary<TKey,TValue> dictionary);new System.Collections.Generic.Dictionary<'Key, 'Value>.KeyCollection : System.Collections.Generic.Dictionary<'Key, 'Value> -> System.Collections.Generic.Dictionary<'Key, 'Value>.KeyCollectionPublic Sub New (dictionary As Dictionary(Of TKey, TValue))Parameters
- dictionary
- Dictionary<TKey,TValue>
The Dictionary<TKey,TValue> whose keys are reflected in the new Dictionary<TKey,TValue>.KeyCollection.
Exceptions
dictionary is null.
Remarks
The Dictionary<TKey,TValue>.KeyCollection is not a static copy; instead, the Dictionary<TKey,TValue>.KeyCollection refers back to the keys in the original Dictionary<TKey,TValue>. Therefore, changes to the Dictionary<TKey,TValue> continue to be reflected in the Dictionary<TKey,TValue>.KeyCollection.
This constructor is an O(1) operation.
