The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Enumerable.ElementAtOrDefault<TSource> Method (IEnumerable<TSource>, Int32)


Returns the element at a specified index in a sequence or a default value if the index is out of range.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

public static TSource ElementAtOrDefault<TSource>(
	this IEnumerable<TSource> source,
	int index


Type: System.Collections.Generic.IEnumerable<TSource>

An IEnumerable<T> to return an element from.

Type: System.Int32

The zero-based index of the element to retrieve.

Return Value

Type: TSource

default(TSource) if the index is outside the bounds of the source sequence; otherwise, the element at the specified position in the source sequence.

Type Parameters


The type of the elements of source.

Exception Condition

source is null.

If the type of source implements IList<T>, that implementation is used to obtain the element at the specified index. Otherwise, this method obtains the specified element.

The default value for reference and nullable types is null.

The following code example demonstrates how to use ElementAtOrDefault<TSource>. This example uses an index that is outside the bounds of the array.

string[] names =
    { "Hartono, Tommy", "Adams, Terry", "Andersen, Henriette Thaulow",
        "Hedlund, Magnus", "Ito, Shu" };

int index = 20;

string name = names.ElementAtOrDefault(index);

    "The name chosen at index {0} is '{1}'.",
    String.IsNullOrEmpty(name) ? "<no name at this index>" : name);

 This code produces the following output:

 The name chosen at index 20 is '<no name at this index>'.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
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
Return to top
© 2015 Microsoft