Observable.Do<TSource> Method (IObservable<TSource>, Action<TSource>)

Invokes an action for each element in the observable sequence.

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

public static IObservable<TSource> Do<TSource>(
	this IObservable<TSource> source,
	Action<TSource> onNext

Type Parameters


The type of source


Type: System.IObservable<TSource>
The source sequence.
Type: System.Action<TSource>
The action to invoke for each element in the observable sequence.

Return Value

Type: System.IObservable<TSource>
The source sequence with the side-effecting behavior applied.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936.aspx or https://msdn.microsoft.com/en-us/library/bb383977.aspx.