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Observable::Single<TSource> Method (IObservable<TSource>)

Returns the only element of an observable sequence and throws an exception if there is not exactly one element in the observable sequence.

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

[ExtensionAttribute]
public:
generic<typename TSource>
static TSource Single(
	IObservable<TSource>^ source
)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System::IObservable<TSource>
The source observable sequence.

Return Value

Type: TSource
The single element in 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 http://msdn.microsoft.com/en-us/library/bb384936.aspx or http://msdn.microsoft.com/en-us/library/bb383977.aspx.
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