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CollectionBase.IList.Insert Method

Inserts an element into the CollectionBase at the specified index.

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

private abstract Insert : 
        index:int * 
        value:Object -> unit  
private override Insert : 
        index:int * 
        value:Object -> unit

Parameters

index
Type: System.Int32

The zero-based index at which value should be inserted.

value
Type: System.Object

The Object to insert.

Implements

IList.Insert(Int32, Object)

ExceptionCondition
ArgumentOutOfRangeException

index is less than zero.

-or-

index is greater than Count.

NotSupportedException

The CollectionBase is read-only.

-or-

The CollectionBase has a fixed size.

If Count already equals the capacity, the capacity of the list is doubled by automatically reallocating the internal array before the new element is inserted.

If index is equal to Count, value is added to the end of CollectionBase.

In collections of contiguous elements, such as lists, the elements that follow the insertion point move down to accommodate the new element. 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, OnInsert, and OnInsertComplete.

The following code example implements the CollectionBase class and uses that implementation to create a collection of Int16 objects.

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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