Observable.MaxBy<TSource, TKey> Method (IObservable<TSource>, Func<TSource, TKey>)

Namespace:  Microsoft.Phone.Reactive
Assembly:  Microsoft.Phone.Reactive (in Microsoft.Phone.Reactive.dll)


<ExtensionAttribute> _
Public Shared Function MaxBy(Of TSource, TKey) ( _
    source As IObservable(Of TSource), _
    keySelector As Func(Of TSource, TKey) _
) As IObservable(Of TSource)
public static IObservable<TSource> MaxBy<TSource, TKey>(
    this IObservable<TSource> source,
    Func<TSource, TKey> keySelector
generic<typename TSource, typename TKey>
static IObservable<TSource>^ MaxBy(
    IObservable<TSource>^ source, 
    Func<TSource, TKey>^ keySelector
static member MaxBy : 
        source:IObservable<'TSource> * 
        keySelector:Func<'TSource, 'TKey> -> IObservable<'TSource> 

Type Parameters

  • TSource
  • TKey


Return Value

Type: System.IObservable<TSource>

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 Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Version Information

.NET for Windows Phone apps

Supported in: Windows Phone 8, Silverlight 8.1

.NET Framework Security

See Also


Observable Class

MaxBy Overload

Microsoft.Phone.Reactive Namespace