ArrayList.Contains(Object) Method
Definition
Important
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Determines whether an element is in the ArrayList.
public:
virtual bool Contains(System::Object ^ item);
public virtual bool Contains (object item);
public virtual bool Contains (object? item);
abstract member Contains : obj -> bool
override this.Contains : obj -> bool
Public Overridable Function Contains (item As Object) As Boolean
Parameters
Returns
true
if item
is found in the ArrayList; otherwise, false
.
Implements
Remarks
This method performs a linear search; therefore, this method is an O(n)
operation, where n
is Count.
This method determines equality by calling Object.Equals.
Starting with the .NET Framework 2.0, this method uses the collection's objects' Equals and CompareTo methods on item
to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item
parameter on the objects in the collection.
Applies to
See also
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