ConcurrentDictionary<TKey,TValue>.AlternateLookup<TAlternateKey>.ContainsKey Method

Reference

Definition

Namespace:: System.Collections.Concurrent

Assembly:: System.Collections.Concurrent.dll

Important

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Determines whether the ConcurrentDictionary<TKey,TValue> contains the specified alternate key.

public:
 bool ContainsKey(TAlternateKey key);

public bool ContainsKey (TAlternateKey key);

member this.ContainsKey : 'AlternateKey -> bool

Public Function ContainsKey (key As TAlternateKey) As Boolean

Parameters

key: TAlternateKey

The alternate key to check.

Returns

Boolean

true if the key is in the dictionary; otherwise, false.

Exceptions

ArgumentNullException

key is null.

Applies to

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