The recording of the first ever ReactiveUI virtual conference is available on our YouTube Channel.


Observable.OfType<TResult> Method

Filters the elements of an observable sequence based on the specified type.

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


<ExtensionAttribute> _
Public Shared Function OfType(Of TResult) ( _
    source As IObservable(Of Object) _
) As IObservable(Of TResult)
Dim source As IObservable(Of Object)
Dim returnValue As IObservable(Of TResult)

returnValue = source.OfType()
public static IObservable<TResult> OfType<TResult>(
    this IObservable<Object> source
generic<typename TResult>
static IObservable<TResult>^ OfType(
    IObservable<Object^>^ source
static member OfType : 
        source:IObservable<Object> -> IObservable<'TResult> 
JScript does not support generic types and methods.

Type Parameters

  • TResult
    The type of result.


Return Value

Type: System.IObservable<TResult>
An observable sequence that contains elements from the input sequence of type TResult.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable<Object>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .

See Also


Observable Class

System.Reactive.Linq Namespace