Determines whether the Hashtable contains a specific value.
- The value to locate in the Hashtable. The value can be null.
true if the Hashtable contains an element with the specified value; otherwise, false.
This method performs a linear search; therefore, this method is an O(n) operation, where n is Hashtable.Count.
Starting with the .NET Framework 2.0, this method uses the collection’s objects’ object.Equals(object) and IComparable.CompareTo(object) methods on item to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the object.Equals(object) and IComparable.CompareTo(object) methods of the item parameter on the objects in the collection.