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.NET Development
.NET Framework 3.5
 RemoveAt Method

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This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
CollectionBase..::.RemoveAt Method

Removes the element at the specified index of the CollectionBase instance. This method is not overridable.

Namespace:  System.Collections
Assembly:  mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Sub RemoveAt ( _
    index As Integer _
)
Visual Basic (Usage)
Dim instance As CollectionBase
Dim index As Integer

instance.RemoveAt(index)
C#
public void RemoveAt(
    int index
)
Visual C++
public:
virtual void RemoveAt(
    int index
) sealed
JScript
public final function RemoveAt(
    index : int
)

Parameters

index
Type: System..::.Int32
The zero-based index of the element to remove.

Implements

IList..::.RemoveAt(Int32)
ExceptionCondition
ArgumentOutOfRangeException

index is less than zero.

-or-

index is equal to or greater than Count.

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.

This method is an O(n) operation, where n is Count.

Notes to Implementers:

This method calls OnValidate, OnRemove, and OnRemoveComplete.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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