protected override void State_Changed(SynchronizedStateEventArgs <SupercedableTaskState <TSource, TResult> > args)
{
using (SynchronizedStateChange <int> idChange = _currentTaskId.ChangeState())
idChange.NewState = args.CurrentState.TaskId;
args.CurrentState.ContinueWith(StateChangeContinuation);
}
/// <summary>
/// Occurs when <see cref="CurrentState"/> has changed.
/// </summary>
/// <param name="args">Containing the previous and current values of <see cref="CurrentState"/>.</param>
protected virtual void State_Changed(SynchronizedStateEventArgs <TState> args)
{
OnStateChanged?.Invoke(this, args);
}