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Observable.LongCount(TSource) Method

Returns a Int64 that represents the total number of elements in an observable sequence.

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

JScript does not support generic types and methods.

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.IObservable(TSource)
An observable sequence that contains elements to be counted.

Return Value

Type: System.IObservable(Int64)
A Int64 that represents the total number of elements in an 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 https://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
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