ConcurrentDictionary<TKey, TValue> Constructor (Int32, IEnumerable<KeyValuePair<TKey, TValue>>, IEqualityComparer<TKey>)

.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, and uses the specified System.Collections.Generic.IEqualityComparer<T>.

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

public ConcurrentDictionary(
	int concurrencyLevel,
	IEnumerable<KeyValuePair<TKey, TValue>> collection,
	IEqualityComparer<TKey> comparer
)

Parameters

concurrencyLevel
Type: System.Int32

The estimated number of threads that will update the ConcurrentDictionary<TKey, TValue> concurrently.

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

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

comparer
Type: System.Collections.Generic.IEqualityComparer<TKey>

The System.Collections.Generic.IEqualityComparer<T> implementation to use when comparing keys.

ExceptionCondition
ArgumentNullException

collection or comparer is null.

ArgumentOutOfRangeException

concurrencyLevel is less than 1.

ArgumentException

collection contains one or more duplicate keys.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1
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