ICollection.Add(Object) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Ensures that this collection contains the specified element (optional operation).
[Android.Runtime.Register("add", "(Ljava/lang/Object;)Z", "GetAdd_Ljava_lang_Object_Handler:Java.Util.ICollectionInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")]
public bool Add (Java.Lang.Object? e);[<Android.Runtime.Register("add", "(Ljava/lang/Object;)Z", "GetAdd_Ljava_lang_Object_Handler:Java.Util.ICollectionInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")>]
abstract member Add : Java.Lang.Object -> boolParameters
- e
- Object
element whose presence in this collection is to be ensured
Returns
true if this collection changed as a result of the
call
- Attributes
Remarks
Ensures that this collection contains the specified element (optional operation). Returns true if this collection changed as a result of the call. (Returns false if this collection does not permit duplicates and already contains the specified element.)
Collections that support this operation may place limitations on what elements may be added to this collection. In particular, some collections will refuse to add null elements, and others will impose restrictions on the type of elements that may be added. Collection classes should clearly specify in their documentation any restrictions on what elements may be added.
If a collection refuses to add a particular element for any reason other than that it already contains the element, it must throw an exception (rather than returning false). This preserves the invariant that a collection always contains the specified element after this call returns.
Java documentation for java.util.Collection.add(E).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.