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Observable::Contains<TSource> Method (IObservable<TSource>, TSource, IEqualityComparer<TSource>)

Determines whether an observable sequence contains a specified element by using a specified System.Collections.Generic.IEqualityComparer&lt;T&gt;.

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

[ExtensionAttribute]
public:
generic<typename TSource>
static IObservable<bool>^ Contains(
	IObservable<TSource>^ source, 
	TSource value, 
	IEqualityComparer<TSource>^ comparer
)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System::IObservable<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::IObservable<Boolean>
True if an observable sequence contains a specified element by using a specified System.Collections.Generic.IEqualityComparer&lt;T&gt; otherwise, false.

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(v=vs.103).aspx or http://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
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