<PackageReference Include="System.ComponentModel.EventBasedAsync" Version="4.0.11-beta-23409" />

System.ComponentModel.RunWorkerCompletedEventArgs

Provides data for the MethodNameCompleted event.
public object Result { get; }

Gets a value that represents the result of an asynchronous operation.

public object UserState { get; }

Gets a value that represents the user state.

public RunWorkerCompletedEventArgs(object result, Exception error, bool cancelled)

Initializes a new instance of the RunWorkerCompletedEventArgs class.