Collection<T>.Insert(Int32, T) Method

Reference

Definition

Namespace:: System.Collections.ObjectModel

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Collection.cs

Source:: Collection.cs

Source:: Collection.cs

Important

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Inserts an element into the Collection<T> at the specified index.

public:
 virtual void Insert(int index, T item);

public void Insert (int index, T item);

abstract member Insert : int * 'T -> unit
override this.Insert : int * 'T -> unit

Public Sub Insert (index As Integer, item As T)

Parameters

index: Int32

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

item: T

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

Implements

Insert(Int32, T)

Exceptions

ArgumentOutOfRangeException

index is less than zero.

-or-

index is greater than Count.

Remarks

Collection<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<T>.

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

Notes to Inheritors

Derived classes can override InsertItem(Int32, T) to change the behavior of this method.

Applies to

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