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Observable.StartWith<TSource> Method (IObservable<TSource>, TSource[])

Prepends a sequence of values to an observable sequence with the specified source and values.

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


<ExtensionAttribute> _
Public Shared Function StartWith(Of TSource) ( _
    source As IObservable(Of TSource), _
    ParamArray values As TSource() _
) As IObservable(Of TSource)
Dim source As IObservable(Of TSource)
Dim values As TSource()
Dim returnValue As IObservable(Of TSource)

returnValue = source.StartWith(values)
public static IObservable<TSource> StartWith<TSource>(
    this IObservable<TSource> source,
    params TSource[] values
generic<typename TSource>
static IObservable<TSource>^ StartWith(
    IObservable<TSource>^ source, 
    ... array<TSource>^ values
static member StartWith : 
        source:IObservable<'TSource> * 
        values:'TSource[] -> IObservable<'TSource> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type of source.


  • values
    Type: TSource[]
    The values to prepend to the specified sequence.

Return Value

Type: System.IObservable<TSource>
The source sequence prepended with the specified values.

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 or .

See Also


Observable Class

StartWith Overload

System.Reactive.Linq Namespace