ConcurrentDictionary<TKey, TValue> Constructor (IEnumerable<KeyValuePair<TKey, TValue>>)

Initializes a new instance of the ConcurrentDictionary<TKey, TValue> class that contains elements copied from the specified IEnumerable<T>, has the default concurrency level, has the default initial capacity, and uses the default comparer for the key type.

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

public ConcurrentDictionary(
	IEnumerable<KeyValuePair<TKey, TValue>> collection
)

Parameters

collection
Type: System.Collections.Generic.IEnumerable<KeyValuePair<TKey, TValue>>

The IEnumerable<T> whose elements are copied to the new ConcurrentDictionary<TKey, TValue>.

ExceptionCondition
ArgumentNullException

collection or any of its keys is null.

ArgumentException

collection contains one or more duplicate keys.

.NET Framework

Supported in: 4.6, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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