Qbservable.Sum Method (IQbservable<Int64>)

Computes the sum of a sequence of Int64 values.

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

public static IQbservable<long> Sum(
	this IQbservable<long> source


Type: System.Reactive.Linq.IQbservable<Int64>
A sequence of Int64 values to calculate the sum of.

Return Value

Type: System.Reactive.Linq.IQbservable<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 IQbservable<Int64>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.