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Qbservable.Distinct<TSource, TKey> Method (IQbservable<TSource>, Expression<Func<TSource, TKey>>, IEqualityComparer<TKey>)

Returns a queryable observable sequence that contains only distinct elements according to the keySelector and comparer.

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

public static IQbservable<TSource> Distinct<TSource, TKey>(
	this IQbservable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	IEqualityComparer<TKey> comparer
)

Type Parameters

TSource

The type of source.

TKey

The type of key.

Parameters

source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence to retain distinct elements for.
keySelector
Type: System.Linq.Expressions.Expression<Func<TSource, TKey>>
A function to compute the comparison key for each element.
comparer
Type: System.Collections.Generic.IEqualityComparer<TKey>
The equality comparer for source elements.

Return Value

Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence only containing the distinct elements, based on a computed key value, from the source sequence.

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 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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