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Observable.ElementAtOrDefault(IObservable, int) method¶

Defined in

Type: Observable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

public static IObservable<TSource?> ElementAtOrDefault<TSource>(this IObservable<TSource> source, int index)

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

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.

Parameters

Name	Type	Description
`source`	IObservable	Observable sequence to return the element from.
`index`	int	The zero-based index of the element to retrieve.

Returns: IObservable -- An observable sequence that produces the element at the specified position in the source sequence, or a default value if the index is outside the bounds of the source sequence.

Exceptions

Type	Condition
System.ArgumentNullException	`source` is null.
System.ArgumentOutOfRangeException	`index` is less than zero.