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

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

.NET Framework (current version)
 

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
Assembly:  mscorlib (in mscorlib.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.

Exception Condition
ArgumentNullException

collection or comparer is null.

ArgumentOutOfRangeException

concurrencyLevel is less than 1.

ArgumentException

collection contains one or more duplicate keys.

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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