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ObservableExtensions.Subscribe<TSource> Method (IObservable<TSource>, Action<TSource>)

Subscribes an element handler to an observable sequence.

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


<ExtensionAttribute> _
Public Shared Function Subscribe(Of TSource) ( _
    source As IObservable(Of TSource), _
    onNext As Action(Of TSource) _
) As IDisposable
Dim source As IObservable(Of TSource)
Dim onNext As Action(Of TSource)
Dim returnValue As IDisposable

returnValue = source.Subscribe(onNext)
public static IDisposable Subscribe<TSource>(
    this IObservable<TSource> source,
    Action<TSource> onNext
generic<typename TSource>
static IDisposable^ Subscribe(
    IObservable<TSource>^ source, 
    Action<TSource>^ onNext
static member Subscribe : 
        source:IObservable<'TSource> * 
        onNext:Action<'TSource> -> IDisposable 
JScript does not support generic types and methods.

Type Parameters

  • TSource


  • onNext
    Type: System.Action<TSource>
    Action to invoke for each element in the observable sequence.

Return Value

Type: System.IDisposable
IDisposable object used to unsubscribe from the observable sequence.

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 or .

See Also


ObservableExtensions Class

Subscribe Overload

System Namespace