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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)

public void RemoveAt(
	int index
)

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.

.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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