Observable.Catch<TSource> Method (IObservable<TSource>, IObservable<TSource>)

Continues an observable sequence that is terminated by an exception with the next observable sequence.

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

public static IObservable<TSource> Catch<TSource>(
	this IObservable<TSource> first,
	IObservable<TSource> second

Type Parameters


The type of source.


Type: System.IObservable<TSource>
First observable sequence whose exception (if any) is caught.
Type: System.IObservable<TSource>
The second observable sequence used to produce results when an error occurred in the first sequence.

Return Value

Type: System.IObservable<TSource>
An observable sequence containing the first sequence's elements, followed by the elements of the second sequence in case an exception occurred.

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.