ArrayList.Capacity Property

Definition

Namespace:

System.Collections

Assembly:

System.Runtime.dll

Source:

ArrayList.cs

Gets or sets the number of elements that the ArrayList can contain.

public:
 virtual property int Capacity { int get(); void set(int value); };

public virtual int Capacity { get; set; }

member this.Capacity : int with get, set

Public Overridable Property Capacity As Integer

Property Value

Int32

The number of elements that the ArrayList can contain.

Exceptions

ArgumentOutOfRangeException

Capacity is set to a value that is less than Count.

OutOfMemoryException

There is not enough memory available on the system.

Remarks

Capacity is the number of elements that the ArrayList can store. Count is the number of elements that are actually in the ArrayList.

Capacity is always greater than or equal to Count. If Count exceeds Capacity while adding elements, the capacity is automatically increased by reallocating the internal array before copying the old elements and adding the new elements.

The capacity can be decreased by calling TrimToSize or by setting the Capacity property explicitly. When the value of Capacity is set explicitly, the internal array is also reallocated to accommodate the specified capacity.

Retrieving the value of this property is an O(1) operation; setting the property is an O(n) operation, where n is the new capacity.

See also

• Count