,System.Linq.Expressions.Expression}},System.Linq.Expressions.Expression{System.Func{System.IObservable{--1},System.IObservable{--2}}})}

) method¶

Defined in

Type: Qbservable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

public static IQbservable<TResult> Multicast<TSource, TIntermediate, TResult>(this IQbservable<TSource> source, Expression<Func<ISubject<TSource, TIntermediate>>> subjectSelector, Expression<Func<IObservable<TIntermediate>, IObservable<TResult>>> selector)

Summary: Multicasts the source sequence notifications through an instantiated subject into all uses of the sequence within a selector function. Each subscription to the resulting sequence causes a separate multicast invocation, exposing the sequence resulting from the selector function's invocation. For specializations with fixed subject types, see Publish, PublishLast, and Replay.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TIntermediate`	The type of the elements produced by the intermediate subject.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`source`	[IQbservable](#	Source sequence which will be multicasted in the specified selector function.
`subjectSelector`	Expression>>	Factory function to create an intermediate subject through which the source sequence's elements will be multicast to the selector function.
`selector`	Expression, IObservable>>	Selector function which can use the multicasted source sequence subject to the policies enforced by the created subject.

Returns: IQbservable -- An observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `subjectSelector` or `selector` is null.