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ConcurrentDictionary<TKey, TValue>::ContainsKey Method (TKey)
.NET Framework (current version)
Determines whether the ConcurrentDictionary<TKey, TValue> contains the specified key.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- key
-
Type:
TKey
The key to locate in the ConcurrentDictionary<TKey, TValue>.
Return Value
Type: System::Booleantrue 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
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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