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Observable.Sum Method (IObservable<Int64>)

Computes the sum of a sequence of Int64 values.

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

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Sum ( _
    source As IObservable(Of Long) _
) As IObservable(Of Long)
'Usage
Dim source As IObservable(Of Long)
Dim returnValue As IObservable(Of Long)

returnValue = source.Sum()
public static IObservable<long> Sum(
    this IObservable<long> source
)
[ExtensionAttribute]
public:
static IObservable<long long>^ Sum(
    IObservable<long long>^ source
)
static member Sum : 
        source:IObservable<int64> -> IObservable<int64> 
public static function Sum(
    source : IObservable<long>
) : IObservable<long>

Parameters

Return Value

Type: System.IObservable<Int64>
The sum of a sequence of Int64 values.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable<Int64>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .

See Also

Reference

Observable Class

Sum Overload

System.Reactive.Linq Namespace