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

.NET Framework (current version)
 
System_CAPS_noteNote

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

Namespace:   System.Collections.Concurrent
Assembly:  mscorlib (in mscorlib.dll)

public bool ContainsKey(
	TKey key
)

Parameters

key
Type: TKey

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

Return Value

Type: System.Boolean

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

Exception Condition
ArgumentNullException

key is null.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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