<PackageReference Include="Nito.AsyncEx.Tasks" Version="5.0.0-pre-03" />

Nito.AsyncEx.Interop.EventArguments<TSender, TEventArgs>

public struct EventArguments<TSender, TEventArgs>
Arguments passed to a .NET event that follows the standard sender, arguments event pattern.
public TEventArgs EventArgs { get; set; }

The event arguments.

public TSender Sender { get; set; }

The sender of the event.