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List<T>::RemoveAt Method

Removes the element at the specified index of the List<T>.

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

public:
virtual void RemoveAt(
	int index
) sealed

Parameters

index
Type: System::Int32

The zero-based index of the element to remove.

Implements

IList<T>::RemoveAt(Int32)
IList::RemoveAt(Int32)

ExceptionCondition
ArgumentOutOfRangeException

index is less than 0.

-or-

index is equal to or greater than Count.

When you call RemoveAt to remove an item, the remaining items in the list are renumbered to replace the removed item. For example, if you remove the item at index 3, the item at index 4 is moved to the 3 position. In addition, the number of items in the list (as represented by the Count property) is reduced by 1.

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

The following example demonstrates how to add, remove, and insert a simple business object in a List<T>.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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