| AsyncEnumerable.Sum<TSource> Method (IAsyncEnumerable<TSource>, Func<TSource, Nullable<Single>>, CancellationToken) |
Namespace: System.Linq
Assembly: System.Interactive.Async (in System.Interactive.Async.dll) Version: 1.2.0.0
SyntaxC#
public static Task<Nullable<float>> Sum<TSource>( this IAsyncEnumerable<TSource> source, Func<TSource, Nullable<float>> selector, CancellationToken cancellationToken )
Parameters
- source
- Type: System.Collections.Generic.IAsyncEnumerable<TSource>
- selector
- Type: System.Func<TSource, Nullable<Single>>
- cancellationToken
- Type: System.Threading.CancellationToken
Type Parameters
- TSource
Return Value
Type: Task<Nullable<Single>>Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncEnumerable<TSource>. 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