Hashtable Constructor (IEqualityComparer)
Assembly: mscorlib (in mscorlib.dll)
null to use the default hash code provider and the default comparer. The default hash code provider is each key's implementation of Object.GetHashCode and the default comparer is each key's implementation of Object.Equals.
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 IEqualityComparer object includes both the hash code provider and the comparer. If an IEqualityComparer is used in the Hashtable constructor, the objects used as keys in the Hashtable object are not required to override the Object.GetHashCode and Object.Equals methods.
The IEqualityComparer enables scenarios such as doing lookups with case-insensitive strings.
This constructor is an O(1) operation.
Available since 10
Available since 2.0