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

Reference

Definition

Namespace:: System.Collections.Concurrent

Assemblies:: mscorlib.dll, System.Collections.Concurrent.dll

Assemblies:: netstandard.dll, System.Collections.Concurrent.dll

Assembly:: System.Collections.Concurrent.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: ConcurrentDictionary.cs

Source:: ConcurrentDictionary.cs

Source:: ConcurrentDictionary.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

public:
 virtual bool ContainsKey(TKey key);

public bool ContainsKey(TKey key);

abstract member ContainsKey : 'Key -> bool
override this.ContainsKey : 'Key -> bool

Public Function ContainsKey (key As TKey) As Boolean

Parameters

key: TKey

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

Returns

Boolean

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

Implements

ContainsKey(TKey) ContainsKey(TKey)

Exceptions

ArgumentNullException

key is null.

Applies to

Производ	Верзије
.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, 10
.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

Делите путем