Initializes a new instance of the
ConcurrentDictionary<(Of <(TKey, TValue>)>)
class that contains elements copied from the specified
IEnumerable,
has the specified concurrency level, has the specified initial capacity, and uses the specified
IEqualityComparer<(Of <(TKey>)>).
Namespace:
System.Collections.Concurrent
Assembly:
System.Threading (in System.Threading.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Sub New ( _
concurrencyLevel As Integer, _
collection As IEnumerable(Of KeyValuePair(Of TKey, TValue)), _
comparer As IEqualityComparer(Of TKey) _
) |
| C# |
|---|
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<(Of <(TKey, TValue>)>) concurrently.
- collection
- Type: System.Collections.Generic..::.IEnumerable<(Of <(KeyValuePair<(Of <(TKey, TValue>)>)>)>)
The IEnumerable<(Of <(KeyValuePair<(Of <(TKey, TValue>)>)>)>) whose elements are copied to the new
ConcurrentDictionary<(Of <(TKey, TValue>)>).
- comparer
- Type: System.Collections.Generic..::.IEqualityComparer<(Of <(TKey>)>)
The IEqualityComparer<(Of <(TKey>)>) implementation to use
when comparing keys.
Exceptions
| Exception | Condition |
|---|
| System..::.ArgumentNullException |
collection is a null reference (Nothing in Visual Basic).
-or-
comparer is a null reference (Nothing in Visual Basic).
|
| System..::.ArgumentOutOfRangeException |
concurrencyLevel is less than 1.
|
| System..::.ArgumentException | collection contains one or more duplicate keys. |
See Also
