Insert Method

Collection(Of T).Insert Method (Int32, T)


Inserts an element into the Collection(Of T) at the specified index.

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

Public Sub Insert (
	index As Integer,
	item As T


Type: System.Int32

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

Type: T

The object to insert. The value can be null for reference types.

Exception Condition

index is less than zero.


index is greater than Count.

Collection(Of T) accepts null as a valid value for reference types and allows duplicate elements.

If index is equal to Count, item is added to the end of Collection(Of T).

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

Notes to Inheritors:

Derived classes can override InsertItem to change the behavior of this method.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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