Qbservable.Contains<TSource> Method (IQbservable<TSource>, TSource, IEqualityComparer<TSource>)

Determines whether an observable sequence contains a specified element by using a specified source type, source, value and comparer.

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

public static IQbservable<bool> Contains<TSource>(
	this IQbservable<TSource> source,
	TSource value,
	IEqualityComparer<TSource> comparer
)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.Reactive.Linq.IQbservable<TSource>
An observable sequence in which to locate a value.
value
Type: TSource
The value to locate a sequence.
comparer
Type: System.Collections.Generic.IEqualityComparer<TSource>
An equality comparer to compare values.

Return Value

Type: System.Reactive.Linq.IQbservable<Boolean>
True if an observable sequence contains a specified element by using a specified source type, source, value and comparer; otherwise, false.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQbservable<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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