TaskExtensions
public static Task ContinueWithState<TState>(this Task task, Action<Task, TState> continuationAction, TState state, TaskContinuationOptions continuationOptions, CancellationToken cancellationToken)
public static Task ContinueWithState<TResult, TState>(this Task<TResult> task, Action<Task<TResult>, TState> continuationAction, TState state, CancellationToken cancellationToken)
public static Task ContinueWithState<TResult, TState>(this Task<TResult> task, Action<Task<TResult>, TState> continuationAction, TState state, TaskContinuationOptions continuationOptions, CancellationToken cancellationToken)