ConcurrentDictionary<TKey,TValue>.ContainsKey(TKey) Method

Definition

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

C#
public bool ContainsKey(TKey key);

Parameters

key
TKey

The key to locate in the ConcurrentDictionary<TKey,TValue>.

Returns

true if the ConcurrentDictionary<TKey,TValue> contains an element with the specified key; otherwise, false.

Implements

Exceptions

key is null.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP 10.0

See also