Interactive Extensions
Ix-Main Namespaces
System.Linq
AsyncEnumerable Class
AsyncEnumerable Methods
Sum Method
Sum Method (IAsyncEnumerable(Decimal))
Sum Method (IAsyncEnumerable(Double))
Sum Method (IAsyncEnumerable(Int32))
Sum Method (IAsyncEnumerable(Int64))
Sum Method (IAsyncEnumerable(Nullable(Decimal)))
Sum Method (IAsyncEnumerable(Nullable(Double)))
Sum Method (IAsyncEnumerable(Nullable(Int32)))
Sum Method (IAsyncEnumerable(Nullable(Int64)))
Sum Method (IAsyncEnumerable(Nullable(Single)))
Sum Method (IAsyncEnumerable(Single))
Sum Method (IAsyncEnumerable(Decimal), CancellationToken)
Sum Method (IAsyncEnumerable(Double), CancellationToken)
Sum Method (IAsyncEnumerable(Int32), CancellationToken)
Sum Method (IAsyncEnumerable(Int64), CancellationToken)
Sum Method (IAsyncEnumerable(Nullable(Decimal)), CancellationToken)
Sum Method (IAsyncEnumerable(Nullable(Double)), CancellationToken)
Sum Method (IAsyncEnumerable(Nullable(Int32)), CancellationToken)
Sum Method (IAsyncEnumerable(Nullable(Int64)), CancellationToken)
Sum Method (IAsyncEnumerable(Nullable(Single)), CancellationToken)
Sum Method (IAsyncEnumerable(Single), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Decimal))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Double))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Int32))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Int64))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Decimal)))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Double)))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Int32)))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Int64)))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Single)))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Single))
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Decimal), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Double), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Int32), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Int64), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Decimal)), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Double)), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Int32)), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Int64)), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Nullable(Single)), CancellationToken)
Sum(TSource) Method (IAsyncEnumerable(TSource), Func(TSource, Single), CancellationToken)
Click or drag to resize
AsyncEnumerableSumTSource Method (IAsyncEnumerableTSource, FuncTSource, NullableDouble)

Namespace: System.Linq
Assembly: System.Interactive.Async (in System.Interactive.Async.dll) Version: 1.2.0.0
Syntax
C#
Copy
public static Task<Nullable<double>> Sum<TSource>(
	this IAsyncEnumerable<TSource> source,
	Func<TSource, Nullable<double>> selector
)

Parameters

source
Type: System.Collections.GenericIAsyncEnumerableTSource
selector
Type: SystemFuncTSource, NullableDouble

Type Parameters

TSource

Return Value

Type: TaskNullableDouble

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncEnumerableTSource. 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).
See Also