Assembly: mscorlib (in mscorlib.dll)
The IEqualityComparer includes both the comparer and the hash code provider. If an IEqualityComparer is used in the Hashtable constructor, the objects used as keys in the Hashtable are not required to override the Object.GetHashCode and Object.Equals methods.
Retrieving the value of this property is an O(1) operation.
Available since 10
Available since 2.0