ArrayList Constructor (Int32)

Initializes a new instance of the ArrayList class that is empty and has the specified initial capacity.

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

public ArrayList(
	int capacity
)

Parameters

capacity
Type: System.Int32
The number of elements that the new list can initially store.

ExceptionCondition
ArgumentOutOfRangeException

capacity is less than zero.

The capacity of an ArrayList is the number of elements that the ArrayList can hold. As elements are added to an ArrayList, the capacity is automatically increased as required by reallocating the internal array.

If the size of the collection can be estimated, specifying the initial capacity eliminates the need to perform a number of resizing operations while adding elements to the ArrayList.

This constructor is an O(n) operation, where n is capacity.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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