Remove Method

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Removes the first occurrence of a specific object from the ArrayList.

Namespace:  System.Collections
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Overridable Sub Remove ( _
    obj As Object _
)

public virtual void Remove(
    Object obj
)

public:
virtual void Remove(
    Object^ obj
)

abstract Remove : 
        obj:Object -> unit 
override Remove : 
        obj:Object -> unit 

public function Remove(
    obj : Object
)

Parameters

• obj
  Type: System. . :: . .Object
  The Object to remove from the ArrayList. The value can be nullNothingnullptrunita null reference (Nothing in Visual Basic).

Implements

IList. . :: . .Remove(Object)

Exceptions

Remarks

If the ArrayList does not contain the specified object, the ArrayList remains unchanged. No exception is thrown.

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.

In collections of contiguous elements, such as lists, the elements that follow the removed element move up to occupy the vacated spot. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table.

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.

See Also

Reference

ArrayList Class

System.Collections Namespace