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

.NET Framework 4.6 and 4.5

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:   mscorlib (in mscorlib.dll)
  System.Collections.Concurrent (in System.Collections.Concurrent.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, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Portable Class Library

Supported in: Portable Class Library
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