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[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
Initializes a new, empty instance of the Hashtable class using the default initial capacity, load factor, hash code provider, and comparer.
Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Sub New
public Hashtable()
public:
Hashtable()
new : unit -> Hashtable
public function Hashtable()
Remarks
A hash table's capacity is used to calculate the optimal number of hash table buckets based on the load factor. Capacity is automatically increased as required.
The load factor is the maximum ratio of elements to buckets. A smaller load factor means faster lookup at the cost of increased memory consumption.
When the actual load factor reaches the specified load factor, the number of buckets is automatically increased to the smallest prime number that is larger than twice the current number of buckets.
The hash code provider dispenses hash codes for keys in the Hashtable object. The default hash code provider is the key's implementation of Object..::..GetHashCode.
The comparer determines whether two keys are equal. Every key in a Hashtable must be unique. The default comparer is the key's implementation of Object..::..Equals.
This constructor is an O(1) operation.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.